EP4737301A1

EP4737301A1 - Improvements relating to landing craft

Info

Publication number: EP4737301A1
Application number: EP24275115.4A
Authority: EP
Inventors: designation of the inventor has not yet been filed The
Original assignee: BAE Systems PLC
Current assignee: BAE Systems PLC
Priority date: 2024-10-29
Filing date: 2024-10-29
Publication date: 2026-05-06

Abstract

A landing craft (10) comprising a hull (100). The hull (100) extends along an x-axis, a first end (102) of the hull (100) and a second end (104) of the hull (100) spaced apart from one another along the x-axis. The hull (100) extends along a y-axis, a first side (106) of the hull (100) and a second side (108) of the hull (100) spaced apart from one another along the y-axis. The hull extends along a z-axis, a base side (110) and a top side (112) of the hull (100) spaced apart from one another along the z-axis. The landing craft (10) comprises a hydrofoil assembly (200) located on the base side (110) of the hull (100).

Description

FIELD

The present disclosure relates to a landing craft.

BACKGROUND

Landing craft are watercraft used to travel on water and to travel up a shoreline to convey people and equipment from the water to land. Conventionally landing craft design and functionality is based around the need to be configured to run up onto a shoreline, but may not provide a comfortable/stable ride for passengers. However, as typical journeys from a mother ship to shore are short, the discomfort levels are acceptable.
However, there is a need for the journey distance to increase to keep the mother ship further from shore, which means even if the water state was good at the beginning of the journey, it may change during the journey. It is generally the case that passengers in a landing craft need to be able to perform duties as soon as they land, and so a landing craft which provides an unstable ride over a long journey may make a set objective more difficult to achieve.
Other operational requirements (for example the firing of weapons and/or the offloading of vehicles from the landing craft) may also be frustrated by conventional landing craft configurations, which may make them difficult to control and keep stable.
Hence a landing craft which provides a more stable ride during travel (e.g. to avoid the passengers getting ill) or when stationary (for example receiving and/or offloading equipment) is highly desirable.

SUMMARY

According to the present disclosure there is provided an apparatus and system as set forth in the appended claims. Other features of the invention will be apparent from the dependent claims, and the description which follows.
Accordingly there may be provided a landing craft (10) comprising a hull (100). The hull (100) extends along an x-axis, a first end (102) of the hull (100) and a second end (104) of the hull (100) being spaced apart from one another along the x-axis. The hull (100) may extend along a y-axis, a first side (106) of the hull (100) and a second side (108) of the hull (100) being spaced apart from one another along the y-axis. The x-axis may be at right angles to the y-axis. The hull may extend along a z-axis, a base side (110) and a top side (112) of the hull (100) being spaced apart from one another along the z-axis. The z-axis may be perpendicular to the x-axis and y-axis.
The landing craft (10) may comprise a hydrofoil assembly (200) located on the base side (110) of the hull (100).
The hydrofoil assembly (200) may comprise a first wing section (202), wherein the hydrofoil assembly (200) extends from the base side (110) in the direction of the z-axis, and the first wing section (202) extends part, but not all, of the way across the base side (110) in the direction of the y-axis.
The hydrofoil assembly (200) may be operable to move between a deployed position (DP) in which the hydrofoil assembly (200) is spaced apart from the base side (110) by a first distance (D1) and a storage position (SP) in which the hydrofoil assembly (200) is located in contact with at least some of the base side (110) and/or spaced apart from the base side (110) by a second distance (D2) which is less than the first distance (D1).
The hull (100) may be configured such that the landing craft (10) has a first mode of operation in which the watercraft is supported by a fluid.
The hull (100) may be configured such that the landing craft (10) has a second mode of operation in which at least part of the lower surface of the hull of the watercraft is engaged with a substrate.
The hull (100) may be configured such that the landing craft (10) has a third mode of operation in which the watercraft transitions from the first mode of operation to the second mode of operation.
The hull (100) may be configured such that the landing craft (10) has a fourth mode of operation in which the watercraft transitions from the second mode of operation to the first mode of operation.
The hydrofoil assembly (200) may be located closer to the first end (102) of the hull (100) than to a mid point between the first end (102) and the second end (104).
The hydrofoil assembly (200) may be located closer to the second end (104) of the hull (100) than to a mid point between the first end (102) and the second end (104).
The base side (110) of the hull (100) may be substantially flat. The hull (100) may comprise a first hull extension (118) provided on the base side (110) of the hull (100) between the first side (106) of the hull (100) and the second side (108) of the hull (108).
The first hull extension (118) may extend in a direction away from the hull (100) in the z-axis and along the base side (110) of the hull (100) along the x-axis at least part of the distance between the first end (102) of the hull (200) and the second end (104) of the hull (100).
The hull (100) may comprise a first hull extension (118) provided on the first side (106) of the hull (100) and a second hull extension (120) provided on the second side (108) of the hull (100). The first hull extension (118) and second hull extension (120) may extend in a direction away from the hull (100) in the z-axis and along the base side (110) of the hull (100) along the x-axis at least part of the distance between the first end (102) of the hull (200) and the second end (104) of the hull (100). A central portion (122) may extend between, and space apart, the first hull extension (118) and the second hull extension (120), such that the central portion (122), first hull extension (118) and second hull extension (120) define a cavity (124) on the underside of the landing craft (10).
The hull (100) may comprise a first hull extension (118) provided on the first side (106) of the hull (100), a second hull extension (120) provided on the second side (108) of the hull (100); a third hull extension (126) provided between, and spaced apart from, the first hull extension (118) and the second hull extension (120). The first hull extension (118), second hull extension (120) and third hull extension (126) may extend in a direction away from the hull (100) in the z-axis and along the base side (110) of the hull (100) along the x-axis at least part of the distance between the first end (102) of the hull (200) and the second end (104) of the hull (100) such that a first sub-cavity (124A) is provided between the first hull extension (118) and the second hull extension (120) and a second sub-cavity (124B) is provided between the second hull extension (120) and the third hull extension (126).
The hydrofoil assembly (200) may extend from the base side (110) of the hull (100) between the first side (106) of the hull (100) and the second side (108) of the hull (100).
The base side (110) may define a channel (132) for receiving the hydrofoil assembly (200) in the storage position (SP). The channel (132) may be configured such that when the hydrofoil assembly (200) is in the storage position (SP), outermost surface of the hydrofoil assembly (200) is flush with, or recessed into, the surface of the base side (110).
The landing craft (10) may further comprise a locker (134) configured to receive the hydrofoil assembly (200) in the storage position (SP) wherein the locker (134) defines a storage space (136) within which the hydrofoil assembly (200) is received. The locker (134) may comprise a door or flap (138) which closes the storage space (136).
The hydrofoil assembly (200) may comprise a first support arm (204) which extends from the base side (110) proximate to the first side (106) of the hull (100). The hydrofoil assembly (200) may comprise a second support arm (206) which extends from the base side (110) proximate to the second side of the hull (100). The first wing section (202) may extend between the first support arm (204) and the second support arm (206).
The hydrofoil assembly (200) may comprise a first support arm (204) which extends from the base side (110) halfway between the first side (106) of the hull (100) and the second side of the hull (100). The first wing section (202) may extend from the first support arm (204).
The hydrofoil assembly (200) may comprise a first support arm (204) which extends from the base side (110) proximate to the first side (106) of the hull (100) and between the first side (106) of the hull (100) and the second side (108) of the hull (100). The first wing section (202) may extend from the first support arm (204).
The hydrofoil assembly (200) may comprise a second support arm (206) which extends from the base side (110) proximate to the second side (108) of the hull (100) and between the first side (106) of the hull (100) and the second side (108) of the hull (100). The wing section (208) may extend from the second support arm (206).
The first wing section (206) may be spaced apart from the second wing section (208) along the x-axis and/or the y-axis.
The hydrofoil assembly (200) may be configured to generate no lift in the z-axis.
The landing craft (10) may comprise a propulsion system (50). The propulsion system (50) may comprise a force producing part (for example a propellor or water jet). The propulsion system (50) may be fixed relative to the hull (100). The force producing part of the propulsion system (50) may be fixed relative to the hull (100).
There may be provided a landing craft (10) comprising a hull (100). The hull (100) extends along an x-axis, a first end (102) of the hull (100) and a second end (104) of the hull (100) being spaced apart from one another along the x-axis. The hull (100) may extend along a y-axis, a first side (106) of the hull (100) and a second side (108) of the hull (100) being spaced apart from one another along the y-axis. The x-axis may be at right angles to the y-axis. The hull may extend along a z-axis, a base side (110) and a top side (112) of the hull (100) being spaced apart from one another along the z-axis. The z-axis may be perpendicular to the x-axis and y-axis. The landing craft (10) may comprise a hydrofoil assembly (200) located on the base side (110) of the hull (100).
The hull (100) may comprise a locker (134) configured to receive the hydrofoil assembly (200) in a storage position (SP). The locker (134) may define a storage space (136) within which the hydrofoil assembly (200) is received. The locker (134) may comprise a door or flap which closes the storage space (136).
There may be provided a landing craft (10) comprising a hull (100). The hull (100) extends along an x-axis, a first end (102) of the hull (100) and a second end (104) of the hull (100) being spaced apart from one another along the x-axis. The hull (100) may extend along a y-axis, a first side (106) of the hull (100) and a second side (108) of the hull (100) being spaced apart from one another along the y-axis. The x-axis may be at right angles to the y-axis. The hull may extend along a z-axis, a base side (110) and a top side (112) of the hull (100) being spaced apart from one another along the z-axis. The z-axis may be perpendicular to the x-axis and y-axis.
The hull (100) may comprise a first hull wall assembly (140) spaced apart from a second hull wall assembly (150) in the direction of the y-axis by a deck assembly (142), the deck assembly (142) having front edge (144) at the first end (102) of the hull (100).
The landing craft (10) may comprise a first ramp (300) which is coupled to, and pivotable relative to, and extends from, the front edge (144) of the deck assembly (142).
The first hull wall assembly (140), second hull wall assembly (150) and deck assembly (142) may define a storage region (146) therebetween.
The first ramp (300) may be operable to have, and to move between an external configuration in which the first ramp (300) extends forwards from the front edge of the deck assembly (142) and an internal configuration in in which the first ramp (300) extends rearwards from the front edge of the deck assembly (142) and is located in the storage region (146).
The landing craft (10) may comprise a support member (152), spaced apart from the front edge of the deck assembly (142) along the x-axis. The support member (152) may extend between the first hull wall assembly (140) and the second hull wall assembly (150) in the direction of the y-axis. The door (154) may be coupled to the support member (152), the door (154) extending from a mount end (156) coupled to the support member (152) to a free end (158).
The door (154) may be operable to have, and to move between an open configuration (160) in which the free end (158) of the door (154) is spaced apart from the first end (102) of the landing craft (10) to define a first opening (162); and a closed configuration (164) in which the free end (158) of the door (154) closes the first opening (162).
The first ramp (300) may comprise a first element (302) which extends from the front edge (144) of the deck assembly (142) to a support edge (304). The second element (306) may extend from, and being pivotable relative to, the support edge (304) of the first element (302).
The first ramp (300) may comprise a third element (308) extending from, and being pivotable relative to, support edge (304) of the first element (302). The second element (306) may be spaced apart from the third element in the direction of the y-axis.
The first ramp (300) may be coupled to the front edge (144) of the deck assembly (142) by a quick release mechanism (310) operable to detach the first ramp (300) from the front edge (144) of the deck assembly (142).
The first hull wall assembly (140) and second hull wall assembly (150) may extend from the first end (102) of the hull (100) and the second end (104) of the hull (200), spaced apart from one another along the y-axis by the deck assembly (142) along the length of the landing craft (10) such that the storage region (146) extends the full length of the landing craft (10) from the front edge (144) of the deck assembly (142) to a rear edge (170) of the deck assembly (142) at the second end (104) of the hull (100).
The first hull wall assembly (140), second hull wall assembly (150) and deck assembly (142) may define a second opening (172) at the second end (104) of the hull (100).
A second ramp (320) may be coupled to, and pivotable relative to, and extend from the rear edge (170) of the deck assembly (142), the second ramp (320) defining a support surface (322).
The second ramp (320) may be operable to have, and to move between, and be fixed in position between: a closed position in which the second ramp (320) closes the second opening (172); and an open position in which the second ramp extends rearwards from the rear edge (170) of the deck assembly (142).
The second ramp (320) may comprise an extension element (330) which fits to an edge of the second ramp (320) and extends from the second ramp (320) in the plane of the second ramp support surface (322).
The extension element (330) may be inflatable.
The extension element (330) may comprises a flap (332) pivotably mounted the second ramp (320) such that it is foldable from a stowage position in which the flap (332) is folded onto or under the second ramp (320) and an extended position in which the flap (332) extends away from the second ramp (320) in the plane of the second ramp support surface (322).
The extension element (330) may comprise a plate element (334) which is detachably mounted to the second ramp (320) such that it extends away from the second ramp (320) in the plane of the second ramp support surface (322).
The first ramp (300), deck assembly (142) and second ramp (320) may define a path along the length of the landing craft in the x-axis.
There may be provided a landing craft (10) comprising a hull (100). The hull (100) extends along an x-axis, a first end (102) of the hull (100) and a second end (104) of the hull (100) being spaced apart from one another along the x-axis. The hull (100) may extend along a y-axis, a first side (106) of the hull (100) and a second side (108) of the hull (100) being spaced apart from one another along the y-axis. The x-axis may be at right angles to the y-axis. The hull may extend along a z-axis, a base side (110) and a top side (112) of the hull (100) being spaced apart from one another along the z-axis. The z-axis may be perpendicular to the x-axis and y-axis.
The hull (100) may comprise a first hull wall assembly (140) spaced apart from a second hull wall assembly (150) in the direction of the y-axis by a deck assembly (142). The first hull wall assembly (140) may comprise a first weapon unit (400). The second hull wall assembly (150) may comprise a second weapon unit (402). The or each weapon unit (400, 402) may be operable to have, and to move between a hidden position in which the or each weapon unit (400, 402) is located within the respective hull wall assembly (140, 150); and a firing position in which the or each weapon unit (400, 402) is located outside of the respective hull wall assembly (140, 150).
The or each weapon unit (400, 402) may be mounted to its respective hull wall assembly (140, 150) via a lift unit (404) operable to move the respective weapon unit (400, 402) between the hidden position and the firing position.
The or each hull wall assembly (140, 150) may define a weapon aperture (410) through which the respective weapon unit (400, 402) is operable to pass through in moving from the hidden position and the firing position.
The or each hull wall assembly (140, 150) may define a wall panel (412) matching the size and shape of the weapon aperture (410) mounted to the top of the or each weapon unit (400, 402), such that when the respective weapon unit (400, 402) is in the hidden position the wall panel (412) outer surface is flush with the outer surface of the respective hull wall assembly (140, 150).
The weapon unit (400, 402) may be provided as cannon or a rocket launcher.
There may be provided a landing craft (10) comprising a hull (100). The hull (100) extends along an x-axis, a first end (102) of the hull (100) and a second end (104) of the hull (100) being spaced apart from one another along the x-axis. The hull (100) may extend along a y-axis, a first side (106) of the hull (100) and a second side (108) of the hull (100) being spaced apart from one another along the y-axis. The x-axis may be at right angles to the y-axis. The hull may extend along a z-axis, a base side (110) and a top side (112) of the hull (100) being spaced apart from one another along the z-axis. The z-axis may be perpendicular to the x-axis and y-axis.
The landing craft (10) may comprise a gyroscopic boat stabiliser (600) fixed to the hull (100) and configured to: sense a change in the landing craft orientation and apply a force to the hull in response to the change in the landing craft orientation.
The landing craft (10) may comprise a first hull wall assembly (140) spaced apart from a second hull wall assembly (150) in the direction of the y-axis by a deck assembly (142).
The first hull wall assembly (140) may comprise a first weapon unit (400); and/or the second hull wall assembly (150) comprises a second weapon unit (402).
The or each weapon unit (400, 402) may be operable to have, and to move between: a hidden position in which the or each weapon unit (400, 402) is located within the respective hull wall assembly (140, 150); and a firing position in which the or each weapon unit (400, 402) is located outside of the respective hull wall assembly (140, 150).
The gyroscopic boat stabiliser (600) may be configured to: detect a change in the landing craft orientation due to force induced on the hull by the firing of the or each weapon unit (400, 402); and apply a force to the hull in response to the change in the landing craft orientation.
The deck assembly (142) may define a path (190) along the length of the landing craft in the x-axis; and the gyroscopic boat stabiliser (600) may be configured to: detect a change in the landing craft orientation due to force induced on the hull by a body travelling along the path (190); and apply a force to the hull in response to the change in the landing craft orientation.
The landing craft (10) may further comprise a hydrofoil assembly (200) located in the central portion (122) of the base side (110) of the hull (100). The hydrofoil assembly (200) may comprise a first wing section (202), wherein the hydrofoil assembly (200) extends from the base side (110) in the direction of the z-axis, and the first wing section (202) extends part, but not all, of the way across the base side (110) in the direction of the y-axis.
The hydrofoil assembly (200) may be operable to move between a deployed position (DP) in which the hydrofoil assembly (200) is spaced apart from the base side (110) by a first distance (D1) and a storage position (SP) in which the hydrofoil assembly (200) is located in contact with at least some of the base side (110) and/or spaced apart from the base side (110) by a second distance (D2) which is less than the first distance (D1).
The gyroscopic boat stabiliser (600) and hydrofoil assembly (200) may be operable independently of one another such that:

the hydrofoil assembly (200) is deployed when the gyroscopic boat stabiliser (600) is operational;
the hydrofoil assembly (200) is deployed when the gyroscopic boat stabiliser (600) is non operational;
the hydrofoil assembly (200) is in the storage position when the gyroscopic boat stabiliser (600) is operational;
the hydrofoil assembly (200) is in the storage position when the gyroscopic boat stabiliser (600) is non operational.

The landing craft (10) may further comprise an interceptor system (700) configured to provide ride stability. The gyroscopic boat stabiliser (600), hydrofoil assembly (200) and interceptor system (700) may be operable independently of one another such that:

when the hydrofoil assembly (200) is deployed, the gyroscopic boat stabiliser (600) is operational and the interceptor system (700) is operational;
when the hydrofoil assembly (200) is deployed, the gyroscopic boat stabiliser (600) is operational and the interceptor system (700) is non-operational;
when the hydrofoil assembly (200) is deployed, the gyroscopic boat stabiliser (600) is non-operational and the interceptor system (700) is non-operational;
when the hydrofoil assembly (200) is in the storage position, the gyroscopic boat stabiliser (600) is non-operational and the interceptor system (700) is non-operational;
when the hydrofoil assembly (200) is in the storage position, the gyroscopic boat stabiliser (600) is operational and the interceptor system (700) is non-operational;
when the hydrofoil assembly (200) is in the storage position, the gyroscopic boat stabiliser (600) is operational and the interceptor system (700) is operational;
when the hydrofoil assembly (200) is in the storage position, the gyroscopic boat stabiliser (600) is non-operational and the interceptor system (700) is operational; and/or
when the hydrofoil assembly (200) is deployed, the gyroscopic boat stabiliser (600) is non-operational and the interceptor system (700) is operational.

The landing craft (10) may comprise a control system (800), the control system (800) operable to control the hydrofoil assembly (200), the gyroscopic boat stabiliser (600) and/or the interceptor system (700).
The interceptor system (700) may be located at the second end (104) of the landing craft (10).
Hence there is provided a landing craft which provides a more stable ride during travel (e.g. to avoid the passengers getting ill) or when stationary (for example receiving and/or offloading equipment).

BRIEF DESCRIPTION OF THE FIGURES

Embodiments of the invention will now be described by way of example only with reference to the figures, in which:

Figure 1 shows a plan view of a landing craft according to the present disclosure;
Figure 2 shows a side view of the landing craft shown in figure 1;
Figure 3 shows a perspective view the landing craft shown in figures 1, 2;
Figure 4 shows a perspective view of an example of a landing craft according to the present disclosure with a first example of a hydrofoil assembly shown;
Figure 5 shows a side and part sectional view of the landing craft shown in figure 4;
Figure 6 shows a view of a stern of a landing craft according to the present disclosure;
Figure 7 shows a perspective view of a landing craft according to the present disclosure with a second example of a hydrofoil assembly shown;
Figure 8 shows a side view of a landing craft according to the present disclosure showing example configurations of hull extensions;
Figures 9, 10, 11 shows end on views of a landing craft according to the present disclosure showing example details of hull extensions;
Figure 12 shows a plan view of an example of a first ramp example of a landing craft according to the present disclosure;
Figure 13 shows a plan view of a landing craft according to the present disclosure illustrating an example of a stern ramp;
Figure 14 shows a plan view of a landing craft according to the present disclosure illustrating an alternative example of a stern ramp;
Figure 15 shows a perspective view of a landing craft according to the present disclosure having the first example of a hydrofoil assembly, a gyroscopic boat stabiliser and an interceptor system;
Figure 16 shows a perspective view of a landing craft according to the present disclosure having the second example of a hydrofoil assembly, a gyroscopic boat stabiliser and an interceptor system;
Figure 17 shows a perspective view of a section of a landing craft of the present disclosure with a weapon unit in a hidden position; and
Figure 18 shows the view of figure 17 with a weapon unit in a firing position.

DETAILED DESCRIPTION

The present disclosure relates to a landing craft. Landing craft are watercraft (e.g. a water vessel, boat or ship, typically having or military purpose) operable to travel on water and to travel up a shoreline (e.g. become grounded) to convey people and equipment from the water to land. They may also be operable to detach from the shoreline to become fully supported by the water and then travel along the water.
As illustrated in the figures, a landing craft 10 according to the present disclosure comprises a hull 100. The term "hull" may be taken to include the main body of a ship or other vessel, including the bottom, sides, and deck.
As illustrated in many of the figures, the hull 100 extends along an x-axis, a first end (e.g. a bow) 102 of the hull 100 and a second end (e.g. the stern) 104 of the hull 100 spaced apart from one another along the x-axis. The hull 100 extends along a y-axis, a first side (e.g. the port side) 106 of the hull 100 and a second side (e.g. the starboard side) 108 of the hull 100 being spaced apart from one another along the y-axis. The hull extends along a z-axis, a base side 110 (e.g. the bottom of the vessel, configured to support the landing craft in/on a fluid and on a solid substrate) and a top side (e.g. a deck, roofing or covering) 112 of the hull 100 spaced apart from one another along the z-axis.
The x-axis is at right angles to the y-axis. The z-axis is perpendicular to the x-axis and y-axis.
The first end 102, the second end 104, the first side 106 and the second side 108 define an outer boundary of the landing craft 10, the base side 110 being located within the outer boundary 130.
As illustrated in figures 4, 5, 7, 8, 15, 16 the landing craft 10 may comprise a hydrofoil assembly 200 located on (e.g. provided on/in) the base side 110 of the hull 100.
The hydrofoil assembly 200 may comprise a first wing (or fin) section 202. The wing section 202 may be configured to generate lift (e.g. in the z-axis). The wing section 202 may be configured as a fin (e.g. such that water can pass over upper and lower surfaces without producing an upward or downward force in the direction of the z-axis, or without producing a lateral force in the direction of the y-axis).
Hence the hydrofoil assembly 200 may be configured to generate lift in the z-axis or may be configured to generate no lift.
The hydrofoil assembly 200 may extend (e.g. be extendable from, and retractable to / into) the base side 110. The hydrofoil assembly 200 may extend in the direction of the z-axis from the base side 110. The first wing section 202 may extend part, but not all, of the way across the base side 110 in the direction of the y-axis. The first wing section 202 may extend within the boundary 130 of the base side 110 in the direction of the y-axis. The first wing section 202 may extend across the base side 110 in the direction of the y-axis. The first wing section 202 may not extend outside of the boundary 130.
The first wing section 202 may extend within a volume beneath the base side 110, the outer perimeter of the volume defined by the largest cross-section of the boundary 130 (e.g. largest cross-section of the hull 100 or the cross-section of the hull 100 at water level) taken through a x-y plane defined by the x-axis and y-axis.
As illustrated in the examples of figures 4, 5, 8, 15, the hydrofoil assembly 200 may comprise a first support arm 204 which extends from the base side 110 proximate to the first side 106 of the hull 100, a second support arm 206 which extends from the base side 110 proximate to the second side of the hull 100. The first wing section 202 may extend between the first support arm 204 and the second support arm 206. The first wing section 202 may terminate at the first support arm 204 and the second support arm 206. Hence the unit formed by the first support arm 204, second support arm 206 and first wing section 202 may be a "U" shape.
The hydrofoil assembly 200 may comprise a first support arm 204 which extends from the base side 110 halfway between the first side 106 of the hull 100 and the second side of the hull 100. The hydrofoil assembly 200 may comprise a single first support arm 204. The first wing section 202 may extend from the first support arm 204.
As illustrated in figures 7, 16 the hydrofoil assembly 200 may comprise a first support arm (204) which extends from the base side (110) proximate to the first side (106) of the hull (100) and between the first side (106) of the hull (100) and the second side (108) of the hull (100), and the first wing section (202) extends from the first support arm (204).
As illustrated in figures 7, 16 the hydrofoil assembly 200 may comprise a second support arm (206) which extends from the base side (110) proximate to the second side (108) of the hull (100) and between the first side (106) of the hull (100) and the second side (108) of the hull (100), and a second wing section (208) which extends from the second support arm (206).
The first wing section (206) may be spaced apart from the second wing section (208) along the x-axis and/or the y-axis.
The first wing section 202 may extend to either side of the first support arm 204 such that it forms an inverted "T" shape. The first wing section 202 may extend from one side of the first support arm 204 such that it forms a "L" shape.
The second wing section 208 may extend to either side of the first support arm 204 such that it forms an inverted "T" shape. The second wing section 208 may extend from one side of the second support arm 206 such that it forms a "L" shape.
In examples where present, the first wing section 202 may be spaced apart from the second wing section 208 along the x-axis and/or the y-axis.
As illustrated in figures 4, 5, 7, 8, 15, 16 the hydrofoil assembly 200 may be retractable (e.g. operable to be retracted into a storage position to be brought into contact with the base side 110 of the hull or into a cavity in the base side 110 of the hull) or extendable (e.g. operable to be extended/moved away from the retracted position such that a wing/fin of the hydrofoil assembly 200 is spaced apart from the base side 110 of the hull so that the wing/fin is operable to have fluid flow over its upper and lower surfaces - i.e. in a deployed position).
Hence, as illustrated in figures 4, 5, 7, 8, 15, 16 the hydrofoil assembly 200 may be operable to move between a deployed position DP in which the hydrofoil assembly 200 (e.g. the wing/fin section) is spaced apart from the base side 110 by a first distance D1 and a storage position SP in which the hydrofoil assembly 200 (e.g. the wing/fin section) is located in contact with at least some of the base side 110 and/or spaced apart from the base side 110 by a second distance D2 which is less than the first distance D1.
Put another way, the hydrofoil assembly 200 may be operable to move between a deployed position DP in which the hydrofoil assembly 200 (e.g. the wing/fin section) is extended such that it is positioned in an operational position, and a storage position SP in which the hydrofoil assembly 200 (e.g. the wing/fin section) is retracted such that it is positioned in a non-operation position.
As illustrated in figures 4, 5, 8, 15 the hydrofoil assembly 200 (i.e. the wing/fin section and support arms) may be operable to retract/extend in a direction along the z-axis.
As illustrated in figures 7, 16 the hydrofoil assembly 200 (i.e. the wing/fin section and support arm(s)) may be operable to retract/extend by pivoting relative to the hull (e.g. pivoting in a x-z plane defined by the x-z axes).
The landing craft 10 may comprise a propulsion system 50. The propulsion system (50) may comprise a force producing part (for example a propellor or water jet). The force producing part of the propulsion system (e.g. propellor, water jet) is fixed relative to the hull 100. Hence the propulsion system 50 (i.e. the thrust producing part of the propulsion system) is fixed relative to the hull 100 and hence does not substantially move relative to the hull in the x-axis, y-axis or z-axis. That is to say, the propulsion system 50 does not move with the hydrofoil as the hydrofoil moves between the deployed position DP and the storage position SP.
The hull 100 may be configured such that the landing craft 10 has a first mode of operation in which the watercraft is supported by (and operable to travel on the surface of) a fluid (e.g. water).
The hull 100 may be configured such that the landing craft 10 has a second mode of operation in which at least part of the lower surface of the hull of the watercraft is engaged with a solid or part solid substrate (e.g. shoreline or beach).
The hull 100 may be configured such that the landing craft 10 has a third mode of operation in which the watercraft transitions from the first mode of operation to the second mode of operation for example by travelling directly from the fluid onto the substrate (e.g. from a body of water onto a shoreline such that at least some of the base side 110 of the hull 100 is contact with the shoreline).
The hull 100 may be configured such that the landing craft 10 has a fourth mode of operation in which the watercraft transitions from the second mode of operation to the first mode of operation (e.g. from a shoreline into a body of water such that the hull 100 is supported by the water).
As illustrated in figures 7, 16 the hydrofoil assembly 200 may be located closer to the first end 102 of the hull 100 than to a mid point between the first end 102 and the second end 104.
As illustrated in figures 4, 5, 8, 15 the hydrofoil assembly 200 may be located closer to the second end 104 of the hull 100 than to a mid point between the first end 102 and the second end 104.
As illustrated in figure 2 the base side 110 of the hull 100 may be substantially flat.
As illustrated in figures 8, 9 the hull 100 may comprise a first hull extension 118 provided on the base side 110 of the hull 100 between the first side 106 of the hull 100 and the second side 108 of the hull 108. The first hull extension 118 may extend in a direction away from the hull 100 in the z-axis and along the base side 110 of the hull 100 along the x-axis at least part of the distance between the first end 102 of the hull 200 and the second end 104 of the hull 100.
As illustrated in figures 8, 10 the hull 100 may comprise a first hull extension 118 provided on the first side 106 of the hull 100 and a second hull extension 120 provided on the second side 108 of the hull 100. The first hull extension 118 and second hull extension 120 may extend in a direction away from the hull 100 in the z-axis and along the base side 110 of the hull 100 along the x-axis at least part of the distance between the first end 102 of the hull 200 and the second end 104 of the hull 100. A central portion 122 may extend between, and space apart, the first hull extension 118 and the second hull extension 120, such that the central portion 122, first hull extension 118 and second hull extension 120 define a cavity 124 on the underside of the landing craft 10.
As illustrated in figures 8, 11 the hull 100 may comprise a first hull extension 118 provided on the first side 106 of the hull 100, a second hull extension 120 provided on the second side 108 of the hull 100; a third hull extension 126 provided between, and spaced apart from, the first hull extension 118 and the second hull extension 120. The first hull extension 118, second hull extension 120 and third hull extension 126 may extend in a direction away from the hull 100 in the z-axis and along the base side 110 of the hull 100 along the x-axis at least part of the distance between the first end 102 of the hull 200 and the second end 104 of the hull 100 such that a first sub-cavity 124A is provided between the first hull extension 118 and the second hull extension 120 and a second sub-cavity 124B is provided between the second hull extension 120 and the third hull extension 126.
The hull 100 is configured to support the landing craft in/on a fluid 30 and on a solid substrate 20.
In examples in which the base side 110 of the hull 100 is substantially flat, the base side 110 is configured to support the landing craft in/on a fluid 30 and on a solid substrate 20.
In examples where present, and as illustrated in figures 8 to 11, the or each hull extension 118, 120, 126 are configured to support the landing craft in/on a fluid 30 and on a solid substrate 20.
In examples in which there is provided a first hull extension 118 and second hull extension 120 the central portion 122 may be spaced apart from the solid substrate 20 by the first hull extension 118 and second hull extension 120.
In examples in which there is provided a first hull extension 118, a second hull extension 120 and a third hull extension 126, the first sub-cavity 124A and the second sub-cavity 124B may defined between the solid substrate 20 and the hull by the first hull extension 118, second hull extension 120 and/or third hull extension 126.
The hydrofoil assembly 200 may extend from the base side 110 of the hull 100 between the first side 106 of the hull 100 and the second side 108 of the hull 100.
The hydrofoil assembly 200 may be located in the central portion 122 on the base side 110 of the hull 100. The hydrofoil assembly 200 may extend from central portion 122 on the base side 110 of the hull 100. In the deployed position DP the hydrofoil assembly 200 may extend into the cavity 124.
By way of a non limiting example, the hydrofoil assembly 200 may be located in and extend (deploy) into the first sub-cavity 124A and the second sub-cavity 124B.
As illustrated in figure 8, the or each hull extension 118, 120, 126 may extend from proximate to the bow 102 in a direction along the x-axis part of the way, but not all of the way, to the stern 104, to a hull extension end 192. The hydrofoil assembly 200 may be located in a region of the base side 110 between the hull extension end 192 and the stern 104. Hence the hull extension 118, 120, 126, the hydrofoil assembly 200 and the stern 104 may be provided in series along the base side 110.
The or each hull extension 118, 120, 126 may be formed integrally with the hull 100 and/or may be provide as bilge keels and/or skegs.
The hydrofoil assembly 200, and the or each hull extension 118, 120, 126 may be configured such that when the hydrofoil assembly 200 is in the storage position SP and the or each hull extension 118, 120, 126 are located on a solid substrate 20, the hydrofoil assembly 200 is spaced apart from the solid substrate 20 by the or each hull extension 118, 120, 126.
As illustrated in figures 5, 8 the base side 110 may define a channel 132 for receiving the hydrofoil assembly 200 (e.g. the wing/fin section) in the storage position SP. The channel 132 may be configured such that when the hydrofoil assembly 200 (i.e. the wing/fin section) is in the storage position SP, outermost surface of the hydrofoil assembly 200 (e.g. the wing/fin section) is flush with, or recessed into, the surface of the base side 110.
As illustrated in figure 5 the landing craft may comprise a locker 134 configured to receive the hydrofoil assembly 200 in the storage position SP wherein the locker 134 defines a storage space 136 within which the hydrofoil assembly 200 is received. The locker 134 may comprise a door or flap 138 which closes the storage space 136.
The door (or flap) 138 may close the storage space 136 when the hydrofoil assembly 200 is in the storage position SP and/or the deployed position DP.
The door (or flap) 138 may slide open/shut (e.g. in a direction along the x-axis) or may be connected to the base side 110 by a hinge joint such that it pivots between "open" and "closed".
The hull 100 may comprise a first hull wall assembly 140 spaced apart from a second hull wall assembly 150 in the direction of the y-axis by a deck assembly 142. The deck assembly 142 may have a front edge 144. The front edge 144) may be provided at the first end 102 (bow) of the hull 100. The front edge 144 may define part of the first end 102 (bow) of the landing craft 10. The front edge 144 may be at the first end 102 of the hull 100.
The bow 102 of the landing craft 10 may extend between the first hull wall assembly 140 and the second hull wall assembly 150 to form the front of the landing craft 10.
The landing craft 10 may comprise a first ramp 300 which is coupled to, and pivotable relative to, and extends from, the front edge 144 of the deck assembly 142.
The first ramp 300 may be coupled to, be pivotable relative to, and extend from, the bow 102 of the landing craft 10.
The first hull wall assembly 140, second hull wall assembly 150 and deck assembly 142 may define a storage region 146 therebetween. The first hull wall assembly 140, second hull wall assembly 150, deck assembly 142 and bow 102 may define a storage region 146 therebetween. That is to say, the hull 100 may define the storage region 146. The first hull wall assembly 140, the second hull wall assembly 150 and bow 102 are illustrated as having a flat profile, but may have any suitable shape or configuration.
As illustrated in figures 2, 4 the first ramp 300 may be operable to have an external configuration in which the first ramp 300 extends forwards from the front edge 144 of the deck assembly 142. The first ramp 300 may be operable to have an external configuration in which the first ramp 300 extends forwards of the bow 102 of the landing craft 10.
The first ramp 300 may be operable to have an internal configuration in in which the first ramp 300 extends rearwards from the front edge of the deck assembly 142 and is located in the storage region 146. In the internal configuration the first ramp 300 may be located inside the hull 100 (e.g bounded by the hull 100).
The first ramp 300 may be operable to move between the external configuration and the internal configuration.
As illustrated in figures 2, 3, 13, 14, the landing craft 10 may comprise a support member 152 (e.g. a girder or other piece of superstructure or the hull), spaced apart from the front edge 144 of the deck assembly 142 along the x-axis. The support member 152 may extend between the first hull wall assembly 140 and the second hull wall assembly 150 in the direction of the y-axis. A door 154 may be coupled to the support member 152, the door 154 extending from a mount end 156 coupled to the support member 152 to a free end 158.
As illustrated in figures 2, 3, the door 154 may be operable to have an open configuration 160 in which the free end 158 of the door 154 is spaced apart from the first end 102 (bow) of the landing craft 10 such that the door 154, the first hull wall assembly 140 and the second hull wall assembly 150 define a first opening 162 (e.g. a doorway to the storage region 146). As illustrated in figures 13, 14 the door 154 may be operable to have a closed configuration 164 in which the door 154 closes the first opening 162 (i.e. spans the first opening 162). In the closed configuration 164 the door 154 may seal the first opening 162. The door 154 may close the first opening 162 with the first ramp 300 inside the storage region 146.
That is to say, the first opening 162 is defined between the first hull wall assembly 140 and the second hull wall assembly 150, and the door 154 is configured and operable to close the first opening 162 (in the closed configuration) or to leave the first opening 162 clear such that it is open (in the open configuration).
The door 154 may be operable to move between the open configuration 160 and the closed configuration 164.
As illustrated in figures 1, 2, the first ramp 300 may comprise a first element 302 (e.g. a first ramp plate or first ramp plate assembly) which extends from the front edge 144 of the deck assembly 142 to a support edge 304. A second element 306 (e.g. a second ramp plate or second ramp plate assembly) may extend from, and be pivotable relative to, the support edge 304 of the first element 302. The second element 306 may be substantially the same width (i.e. extend in a direction of the y-axis) as the first element 302.
As illustrated in figure 12, the first ramp 300 may comprise a third element 308 (e.g. a third ramp plate or third ramp plate assembly) extending from, and being pivotable relative to, support edge 304 of the first element 302. The second element 306 may be spaced apart from the third element in the direction of the y-axis. The second element 306 and the third element 308 may be pivotable/moveable relative to one another in a x-z plane defined by the x-z axis.
The first ramp 300 may be coupled to the front edge 144 of the deck assembly 142 by a quick release mechanism 310 operable to detach the first ramp 300 from the front edge 144 of the deck assembly 142. Hence the first ramp 300 may be detachable from the bow 102 (i.e. hull 100) of the landing craft 10.
Since the first ramp 300 may not form part of the outer shape (i.e. profile or surface) of the hull 100, the absence of the first ramp 300 will have no effect on the ability of the landing craft 10 to travel on water and/or travel up a shoreline. Hence even with the first ramp detached, the landing craft 10 is operationally intact, with the same external hull shape. This is advantageous as it means the landing craft may (for example) leave a shoreline without the first ramp 300 and be able to operate/perform/travel on water as effectively as if the first ramp 300 was attached.
As illustrated in figures 2, 6, the first hull wall assembly 140 and second hull wall assembly 150 may extend from the first end 102 of the hull 100 and the second end 104 of the hull 200, spaced apart from one another along the y-axis by the deck assembly 142 along the length of the landing craft 10 (i.e. in the x-axis) such that the storage region 146 extends the full length of the landing craft 10 from the front edge 144 of the deck assembly 142 to a rear edge 170 of the deck assembly 142 at the second end 104 of the hull 100.
The first hull wall assembly 140, second hull wall assembly 150 and deck assembly 142 may define a second opening 172 to the storage region 146.
As illustrated in figures 2, 3, 6, 13, 14, a second (rear) ramp 320 may be coupled to, and pivotable relative to, and extend from the rear edge 170 of the deck assembly 142 (i.e. at the stern end 104). The second ramp 320 may define a support surface 322.
As illustrated in figures 4, 5, 7, 8, the second ramp 320 is operable to have a closed position in which the second ramp 320 closes the second opening 172.
As illustrated in figures 2, 3, 6, 13, 14, the second ramp 320 is operable to have an open position in which the second ramp 320 extends rearwards from the rear edge 170 of the deck assembly 142.
The second ramp 320 may be operable to move between the closed position and the open position.
The second ramp 320 may be operable to be fixed in position between the closed position and the open position. Hence the second ramp 320 may be held at several positions relative to the hull 100. For example the second ramp 320 may be angled into water to deploy equipment into the water, or to retrieve equipment and/or personnel from the water. Alternatively or additionally the second ramp 320 may be held horizontal (e.g. aligned with a x-y plane defined by the x-y axis) as a landing/take off platform for a drone, or to receive/remove personnel, and/or to overlap with another ramp from a second landing craft to allow people and/or equipment to move from one landing craft to another.
As illustrated in figures 13, 14 the second ramp 320 may comprise an extension element 330 (or extension element assembly 330) which fits to one or more edges of the second ramp 320 and extends from the second ramp 320 in the plane of the second ramp support surface 322 to provide additional target/support/capture area supported by the second ramp 320.
The extension element 330 may be inflatable.
As illustrated in figure 13 the extension element 330 may comprise one or more plate elements 334 which are detachably mounted to the second ramp 320.
As illustrated in figure 14 the extension element 330 may comprise one or more flaps 332 pivotably mounted the second ramp 320 such the or each flap are foldable from a stowage position in which the flap 332 is folded onto or under the second ramp 320 and a extended position in which the flap 332 extends away from the second ramp 320 in the plane of the second ramp support surface 322.
As illustrated in figure 2 the first ramp 300, deck assembly 142 and second ramp 320 define a path along the length of the landing craft in the x-axis.
As illustrated in figures 1 to 3, 13, 14, 17, 18 the first hull wall assembly 140 may comprise a first weapon unit 400. The second hull wall assembly 150 may comprise a second weapon unit 402.
As shown in figures 1, 17, the or each weapon unit 400, 402 may be operable to have a hidden position in which the or each weapon unit 400, 402 is located within the respective hull wall assembly 140, 150.
As shown in figures 2, 3, 18 the or each weapon unit 400, 402 may be operable to have a firing position in which the or each weapon unit 400, 402 is located outside of the respective hull wall assembly 140, 150 (for example so it may be aimed at, and fire at, a target). The or each weapon unit 400, 402 may be operable to move between the hidden position and the firing position.
The or each weapon unit 400, 402 may be mounted to/in its respective hull wall assembly 140, 150 via a lift unit 404 (for example a hydraulic rising) operable to move the respective weapon unit 400, 402 between the hidden position and the firing position.
The or each hull wall assembly 140, 150 may define a weapon aperture 410 through which the respective weapon unit 400, 402 is operable to pass through in moving from the hidden position and the firing position.
A wall panel 412 matching the size and shape of the weapon aperture 410 may be mounted to the top of the or each weapon unit 400, 402, such that when the respective weapon unit 400, 402 is in the hidden position the wall panel 412 outer surface is flush with the outer surface of the respective hull wall assembly 140, 150.
The or each weapon unit 400, 402 may be provided as cannon or a rocket launcher.
As illustrated in figures 15, 16 the landing craft 10 may comprise a gyroscopic boat stabiliser 600 fixed to the hull 100. Gyroscopic boat stabilizers are known in the art to counteract unwanted motion.
The gyroscopic boat stabiliser 600 may be installed to the hull beneath the deck assembly 142. The gyroscopic boat stabiliser 600 may be operable to counteract the sea state and vibrations.
The landing craft 10 may further comprise a control system 800 operable to control the gyroscopic boat stabiliser 600.
The gyroscopic boat stabiliser 600 may be configured to apply a force to the hull in response to the change in the landing craft orientation.
The gyroscopic boat stabiliser 600 may comprise sensors which send signals to the control system 800 and/or the gyroscopic boat stabiliser 600 indicating a change in the landing craft orientation (e.g. pitch about the y-axis, roll about the x-axis, yaw about the z-axis, and/or displacement in the direction of the x, y and/or z axis) when the landing craft 10 is travelling relative to the water/fluid it is located in, or when the landing craft 10 is at least in part supported by fluid/water it is located in. The gyroscopic boat stabiliser 600 may be configured to apply a force to the hull in response to the sensed change in the landing craft orientation. The gyroscopic boat stabiliser 600 may be configured to apply a force to the hull in response to the change in the landing craft orientation in response to one or more signals from the or each sensor.
The gyroscopic boat stabiliser 600 may be configured to apply a force to the hull to counteract and/or reduce the change in orientation due to forces being applied to the hull (e.g. from waves, wind, equipment being used and/or moved on the landing craft) to thereby increase the stability of the landing craft 10 (e.g. reduce pitch about the y-axis, roll about the x-axis, yaw about the z-axis, and/or displacement in the direction of the x, y and/or z axis).
In examples in which the landing craft comprises one or more weapon units 400, 402, the gyroscopic boat stabiliser 600 (and/or or associated sensors) may be configured to detect a change in the landing craft orientation (e.g. pitch about the y-axis, roll about the x-axis, yaw about the z-axis, and/or displacement in the direction of the x, y and/or z axis) due to force induced on the hull by the firing of the or each weapon unit 400, 402. The gyroscopic boat stabiliser 600 may be operable apply a force to the hull in response to the change in the landing craft orientation to reduce the motion induced by the force from use of the or each weapon unit 400, 402.
In an example in which the deck assembly 142 defines a path 190 along the length of the landing craft in the x-axis, the gyroscopic boat stabiliser 600 may be configured to detect a change in the landing craft orientation (e.g. pitch about the y-axis, roll about the x-axis, yaw about the z-axis, and/or displacement in the direction of the x, y and/or z axis) due to force induced on the hull by a body travelling along the path 190. The gyroscopic boat stabiliser 600 may be operable apply a force to the hull in response to the change in the landing craft orientation to reduce the motion induced by the force of a body travelling along the path 190.
That is to say, the gyroscopic boat stabiliser 600 may be operable to provide stability when stationary to enable vehicle or personnel to leave or enter the landing craft 10.
In examples in which the landing craft 10 comprises a hydrofoil assembly 200 and the gyroscopic boat stabiliser 600, the gyroscopic boat stabiliser 600 and hydrofoil assembly 200 may be operable independently of one another.
The hydrofoil assembly 200 may be deployed when the gyroscopic boat stabiliser 600 is operational.
The hydrofoil assembly 200 may be deployed when the gyroscopic boat stabiliser 600 is non operational.
The hydrofoil assembly 200 may be in the storage position when the gyroscopic boat stabiliser 600 is operational.
The hydrofoil assembly 200 may be in the storage position when the gyroscopic boat stabiliser 600 is non operational.
As illustrated in figures 15, 16 the landing craft 10 may comprise an interceptor system 700. Interceptor systems 700 are well known in the art, and are used on watercraft to improve stability, trim, and overall performance. The interceptor system 700 may be located at the second end (stern) 104 of the landing craft 10.
In examples in which the landing craft 10 comprises an interceptor system 700, a hydrofoil assembly 200 and a gyroscopic boat stabiliser 600, the gyroscopic boat stabiliser 600, hydrofoil assembly 200 and interceptor system 700 may be operable independently of one another.
When the hydrofoil assembly 200 is deployed, the gyroscopic boat stabiliser 600 may be operational and the interceptor system 700 may be operational.
When the hydrofoil assembly 200 is deployed, the gyroscopic boat stabiliser 600 may be operational and the interceptor system 700 may be non-operational;
When the hydrofoil assembly 200 is deployed, the gyroscopic boat stabiliser 600 may be non-operational and the interceptor system 700 may be non-operational.
When the hydrofoil assembly 200 is in the storage position, the gyroscopic boat stabiliser 600 may be non-operational and the interceptor system 700 may be non-operational.
When the hydrofoil assembly 200 is in the storage position, the gyroscopic boat stabiliser 600 may be operational and the interceptor system 700 may be non-operational.
When the hydrofoil assembly 200 is in the storage position, the gyroscopic boat stabiliser 600 may be operational and the interceptor system 700 may be operational.
When the hydrofoil assembly 200 is in the storage position, the gyroscopic boat stabiliser 600 may be non-operational and the interceptor system 700 may be operational.
When the hydrofoil assembly 200 is deployed, the gyroscopic boat stabiliser 600 may be non-operational and the interceptor system 700 may be operational.
The control system 800 operable to control the hydrofoil assembly 200, the gyroscopic boat stabiliser 600 and/or the interceptor system 700.
Hence there is provided a landing craft which provides a more stable ride during travel (e.g. to avoid the passengers getting ill) or when stationary (for example receiving and/or offloading equipment).
The provision of a hydrofoil assembly provides greater ride stability (e.g. in the z-axis and y-axis), and may increase the speed of the landing craft. This will contribute to delivering equipment and personnel to where needed. In the case of personnel, the provision of the hydrofoil assembly may also contribute to avoiding personnel being affected by the sea state, and help with control of the landing craft.
Since the hydrofoil assembly is retractable, it can be withdrawn to a position where contact with a substrate beneath the landing craft (e.g. a shoreline) is avoided or reduced to avoid damage to the hydrofoil assembly.
The provision of a locker provides a shielded location for the hydrofoil assembly when not in use.
The front ramp arrangement provides a means for retaining a bow shape at the front end of the landing craft, since, when not in use, the ramp retracts into the landing craft rather than forming an outer surface of the landing craft.
The rear ramp enables operations to be performed at the rear of the landing craft, as well as enabling the linking together of the landing craft to form a path.
The ability to move weapons between a hidden position and a firing position assists with protecting the weapons when not in use as well as helping to define an aerodynamic hull shape when the weapons are retracted.
The provision of a gyroscopic stability system provides an additional or alternative means to increase stability of the landing craft when in motion or when static, so operations may be more easily achieves on the landing craft.
Attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims, abstract and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.

Claims

A landing craft comprising a hull wherein:
the hull extends along an x-axis, a first end of the hull and a second end of the hull being spaced apart from one another along the x-axis;

the hull extends along a y-axis, a first side of the hull and a second side of the hull being spaced apart from one another along the y-axis; the x-axis being at right angles to the y-axis;

the hull extends along a z-axis, a base side and a top side of the hull being spaced apart from one another along the z-axis, the z-axis being perpendicular to the x-axis and y-axis;

the landing craft further comprising a hydrofoil assembly located on the base side of the hull.
A landing craft as claimed in claim 1 wherein:
the hydrofoil assembly comprises a first wing section, wherein the hydrofoil assembly is extendable from the base side, and the first wing section extends part, but not all, of the way across the base side in the direction of the y-axis; and

the hydrofoil assembly is operable to move between a deployed position (DP) in which the hydrofoil assembly is spaced apart from the base side by a first distance (D1) and a storage position (SP) in which the hydrofoil assembly is located in contact with at least some of the base side and/or spaced apart from the base side by a second distance (D2) which is less than the first distance (D1).
A landing craft as claimed in claim 1 or claim 2 wherein the hull is configured such that the landing craft has:
a first mode of operation in which the watercraft is supported by a fluid;

a second mode of operation in which at least part of the lower surface of the hull of the watercraft is engaged with a substrate;

a third mode of operation in which the watercraft transitions from the first mode of operation to the second mode of operation; and

a fourth mode of operation in which the watercraft transitions from the second mode of operation to the first mode of operation.
A landing craft as claimed in any one of claims 1 to 3 wherein the hydrofoil assembly is located closer to the first end of the hull than to a mid point between the first end and the second end; or
the hydrofoil assembly is located closer to the second end of the hull than to

the mid point between the first end and the second end.
A landing craft as claimed in any one of claims 1 to 4 wherein the base side of the hull is substantially flat.
A landing craft as claimed in any one of claims 1 to 4 wherein:
the hull comprises a first hull extension provided on the base side of the hull between the first side of the hull and the second side of the hull; the first hull extension extending in a direction away from the hull in the z-axis and along the base side of the hull along the x-axis at least part of the distance between the first end of the hull and the second end of the hull; or

the hull comprises a first hull extension provided on the first side of the hull and a second hull extension provided on the second side of the hull; the first hull extension and second hull extension extending in a direction away from the hull in the z-axis and along the base side of the hull along the x-axis at least part of the distance between the first end of the hull and the second end of the hull; a central portion extending between, and spacing apart, the first hull extension and the second hull extension, such that the central portion, first hull extension and second hull extension define a cavity on the underside of the landing craft.
A landing craft as claimed in any one of claims 1 to 4 wherein the hull comprises a first hull extension provided on the first side of the hull, a second hull extension provided on the second side of the hull; a third hull extension provided between, and spaced apart from, the first hull extension and the second hull extension; the first hull extension, second hull extension and third hull extension extending in a direction away from the hull in the z-axis and along the base side of the hull along the x-axis at least part of the distance between the first end of the hull and the second end of the hull such that a first sub-cavity is provided between the first hull extension and the second hull extension and a second sub-cavity is provided between the second hull extension and the third hull extension.
A landing craft as claimed in any one of the preceding claims wherein the hydrofoil assembly extends from the base side of the hull between the first side of the hull and the second side of the hull.
A landing craft as claimed in any one of claims 1 to 8 wherein the base side defines a channel for receiving the hydrofoil assembly in the storage position (SP), the channel being configured such that when the hydrofoil assembly is in the storage position (SP), outermost surface of the hydrofoil assembly is flush with, or recessed into, the surface of the base side.
A landing craft as claimed in any one of claims 1 to 9 further comprising a locker configured to receive the hydrofoil assembly in the storage position (SP) wherein the locker defines a storage space within which the hydrofoil assembly is received; and
the locker comprises a door or flap which is operable to close the storage space.
A landing craft as claimed in any one of claims 1 to 10 wherein the hydrofoil assembly comprises:
a first support arm which extends from the base side proximate to the first side of the hull; and

a second support arm which extends from the base side proximate to the second side of the hull; and

the first wing section extends between the first support arm and the second support arm.
A landing craft as claimed in any one of claims 1 to 10 wherein the hydrofoil assembly comprises:
a first support arm which extends from the base side halfway between the first side of the hull and the second side of the hull, and

the first wing section extends from the first support arm.
A landing craft as claimed in any one of claims 1 to 10 wherein the hydrofoil assembly comprises:
a first support arm which extends from the base side proximate to the first side of the hull and between the first side of the hull and the second side of the hull, and the first wing section extends from the first support arm;

a second support arm which extends from the base side proximate to the second side of the hull and between the first side of the hull and the second side of the hull; and a second wing section which extends from the second support arm;

the first wing section being spaced apart from the second wing section along the x-axis and/or the y-axis.
A landing craft as claimed in any one of claims 1 to 13 wherein the hydrofoil assembly is configured to generate no lift in the z-axis.
A landing craft as claimed any one of claims 1 to 14 further comprising a propulsion system, where the force producing part of the propulsion system is fixed relative to the hull.