CA2020202A1 - System for deploying horizontal line array - Google Patents
System for deploying horizontal line arrayInfo
- Publication number
- CA2020202A1 CA2020202A1 CA 2020202 CA2020202A CA2020202A1 CA 2020202 A1 CA2020202 A1 CA 2020202A1 CA 2020202 CA2020202 CA 2020202 CA 2020202 A CA2020202 A CA 2020202A CA 2020202 A1 CA2020202 A1 CA 2020202A1
- Authority
- CA
- Canada
- Prior art keywords
- array
- leading end
- cable
- trailing end
- predetermined depth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/004—Mounting transducers, e.g. provided with mechanical moving or orienting device
- G10K11/006—Transducer mounting in underwater equipment, e.g. sonobuoys
- G10K11/008—Arrays of transducers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
ABSTRACT
A sonobuoy system and method for deploying an array of transducers in a substantially horizontal line at a desired depth below the surface of a body of water. The trailing end of the array is deployed first, allowed to descend, and suspended at the desired operating depth. The leading end of the array is then released, allowed to descend slowly, and suspended at the desired operating depth. A drag device attached to the trailing end of the array causes the trailing end of the array to be stretched out away from the leading end, thereby maintaining the array in a substantially horizontal line at the desired depth. The system and method make it possible to deploy horizontal line arrays in a minimum of time and at shallow depths.
A sonobuoy system and method for deploying an array of transducers in a substantially horizontal line at a desired depth below the surface of a body of water. The trailing end of the array is deployed first, allowed to descend, and suspended at the desired operating depth. The leading end of the array is then released, allowed to descend slowly, and suspended at the desired operating depth. A drag device attached to the trailing end of the array causes the trailing end of the array to be stretched out away from the leading end, thereby maintaining the array in a substantially horizontal line at the desired depth. The system and method make it possible to deploy horizontal line arrays in a minimum of time and at shallow depths.
Description
DOCKET E4428.01 EAO:cjf 3The invention relates to a system for 4 rapidly deploying from a sonobuoy a line array of electro-acoustic transducers and for positioning the 6 array horizontally at a desired depth below the 7 water's surface.
9The use of arrays of electro-acoustic transducers deployed from sonobuoys has a variety of 11 applications in military and commercial fields. A
12 commercial application consists of using such an array 13 to receive reflected acoustic waves in oil exploration 14 surveys. Submarine detection is the principle use in the military field. While individual sonobuoys having 16 a single transducer or a vertical line array of 17 transducers are useful for some applications, other 18 applications require the use of an array of multiple 19 transducers arranged in a horizontal line at a predetermined depth below the water's surface, 21 sometimes extending over a substantial distance.
9The use of arrays of electro-acoustic transducers deployed from sonobuoys has a variety of 11 applications in military and commercial fields. A
12 commercial application consists of using such an array 13 to receive reflected acoustic waves in oil exploration 14 surveys. Submarine detection is the principle use in the military field. While individual sonobuoys having 16 a single transducer or a vertical line array of 17 transducers are useful for some applications, other 18 applications require the use of an array of multiple 19 transducers arranged in a horizontal line at a predetermined depth below the water's surface, 21 sometimes extending over a substantial distance.
2~2~
1 Typically, such horizontal array systems 2 comprise a horizontal line array, consisting of a 3 cable having a plurality of transducers mounted 4 thereon at a selected interval, and vertical suspension cables, attached to the leading and 6 trailing ends of the horizontal array cable and 7 including selected motion isolation and drag inducing 8 components. In the prior art, such systems have been 9 deployed sequentially. That is, first the trailing end vertical suspension cable is paid out from the 11 deploying sonobuoy, followed by the array cable, and 12 finally the leading end vertical suspension cable.
13 The system then is allowed to stabilize, with the 14 leading and trailing end suspension cables in a vertical attitude and the array in a horizontal 16 attitude.
17 While the above described deployment 18 method is satisfactory for some applications, other 19 applications require that the transducer array be deployed very rapidly or at a shallow depth. But, the 21 time required for deployment is a function of the 22 length of the horizontal array and the length of the 23 suspension cables, the latter of which also determines 24 the depth at which the array will be deployed. For example, a deployment time of thirty minutes is 26 desirable for some applications. However, due to the 27 length of the array involved and the time required for ~" . . ..
20202~2 1 the array to reach the desired operating depth, the 2 prior art sequential method of deployment has been 3 unable to achieve the desired thirty-minute deployment 4 time.
It is, therefore, an object of the present 6 invention to provide a new and improved system for 7 rapidly deploying a horizontal line array of electro-8 acoustic transducers from a sonobuoy, as well as new 9 sonobuoys employing such system.
SUMMARY OF THE INVENTION
11 In accordance with the present invention 12 there is provided a sonobuoy system for deploying an 13 array of transducers at a predetermined depth below 14 the water surface in predetermined time. The system has a cable having a plurality of transducers attached 16 to it, and a containment means for containing said 17 cable and capable of floating at or near the surface 18 of the water. The system also has a cable control 19 means for causing the trailing end and leading end of the cable to be set at a predetermined depth below the 21 water's surface. When the cable control means 22 selectively releases the trailing end of said cable 23 upon the sonobuoy system being deployed in the water, 24 the cable control means permits the trailing end of the cable to descend to a predetermined depth. When 26 the predetermined depth is reached, the cable is then . , 1 held until the predetermined time has elapsed. After 2 the elapse of the predetermined time, the leading end 3 of the cable is selectively released and allowed to 4 descend to the predetermined depth.
For a better understanding of the present 6 invention, together with other and further objects, 7 reference is made to the following description, taken 8 in conjunction with the accompanying drawings, and its 9 scope will be pointed out in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
11 Fig. 1 illustrates a sonobuoy, embodying 12 the invention, in its packaged state, ready for 13 deployment.
14 Fig. 2 illustrates the first phase of deployment of a horizontal line array from the 16 sonobuoy of Fig. 1.
17 Fig. 3 illustrates the beginning of the 18 second phase of deployment.
19 Fig. 4 illustrates the position of the array at the end of the second phase of deployment.
21 Fig. 5 illustrates the third phase of the 22 deployment.
23 Fig. 6 is a view of the invention in its 24 fully deployed state, showing the transducer array in a horizontal position at the desired depth below the 26 surface of the water.
' DESCRIPTION OF THE INVENTION
2 Fig. 1 shows the a sonobuoy 10, typically 3 cylindrical in form, which embodies the invention and 4 is ready for deployment. The sonobuoy is usually 5 launched from a plane or ship by dropping the sonobuoy 6 into the water. If launched from a plane, the 7 sonobuoy housing 22 would normally include means for 8 suitably slowing its descent, such as rotor blades or 9 a parachute, in a manner well known in the art.
The sonobuoy housing 22 includes a surface 11 float 12 that is releasably connected to cable 12 container 16, which houses the leading end array 13 suspension cable. Cable container 16 is preferably 14 cylindrically shaped with the diameter of the cylinder 15 approximately equal to the diameter of the cylindrical 16 portion of the surface float 12. Cable container 16 17 is also releasably attached to array container 19, 18 which contains the array cable and its transducers, 19 and has a diameter corresponding to the diameter of float 12 and cable container 16. Cable container 28, 21 which houses the trailing end suspension cable, also 22 preferably has a cylindrical shape of approximately 23 the same diameter as the other elements and is 24 releasably attached to array container 19.
Fig. 2 shows sonobuoy 10 shortly after it 26 has been dropped into the water. Surface float 12 27 slides out of housing 22, inflates and remains at the . .
1 surface of the water throughout the use of the 2 system. Float 12 includes an antenna 35 and 3 associated electronics, for transmitting information 4 collected by the array of transducers after it is deployed.
6 Cable container 16 slides out of housing 7 22 and drops away from float 12 but remains attached 8 to float 12 by a connecting member 14, which is 9 preferably a compliant cable containing one or more electrical leads carry signals from the array to the 11 electronics package in float 12. Cable container 16 12 contains leading end suspension cable 29, damper 13 device 32 and array electronics package 34. ~he 14 weight of descent housing 22 and cable container 28 causes array cable, having transducers 20 affixed 16 thereto at a selected interval, to be paid out from 17 array container 19. Array container 19 is constructed 18 in separable halves which separate and fall away as 19 shown. Eventually, cable container 28 slides out of housing 22 and the housing falls away as shown in Fig.
21 2.
22 Fig. 3 shows the beginning of the second 23 phase of the deployment of the horizontal line array 24 system. After housing 22 drops away, cable container 28, which is buoyant and contains trailing end 26 suspension cable 25 and drag device 24, is free to 27 float toward the water's surface but remains attached :
, ~ , .. . . : : .
2~2~2~2 1 to array cable 18 via connecting member 26. The 2 combination of floating container 28 and trailing end 3 suspension cable 25 serves to keep the trailing end of 4 the array cable 18 at a predetermined depth below the water's surface determined by the length of cable 25.
6 Since connecting member 26 connects the trailing end 7 of array cable 18 to the combination of drag device 24 8 and the lower end of suspension cable 25 and is not 9 required to provide electrical connection, nylon line or other flexible cable is suitable. Connected 11 between connecting member 26 and the lower end of 12 cable 25 is drag device 24, which may be a drogue.
13 Drag device 24 impedes the drift of the trailing end 14 of array cable 18 relative to float 12, while float 12 is free to drift with the prevailing surface current.
16 This causes cable 18 to be stretched out in an angular 17 configuration as shown in Fig 4.
18 Fig. 4 shows the final position of the 19 line array 18/20 at the end of the second phase of deployment, when the array is deployed to maximum 21 extension. The time required to complete this phase 22 varies depending on the length of the array and 23 suspension cables. At the end of this timed phase, 24 leading end 27 of cable 18 is released from cable container 16 via a preset timing mechanism.
26 Fig. 5 shows the third phase of 27 deployment. Array electronics container 34, which had ~., ' ' .
., 2~202~2 1 been releasably contained within cable container 16, 2 is released and descends with leading end 27 of cable 3 18 attached to it. Container 34 remains connected to 4 cable container 16 by means of leading end suspension cable 29, which may be a compliant cable for example.
6 In order to prevent container 34 from descending too 7 rapidly, which may cause suspension cable 29 to tangle 8 with array cable 18, leading end drag device 32 is 9 attached along suspension cable 29 near container 34.
Drag device 32 thus slows the descent of container 34.
11 After a predetermined length of suspension 12 cable 29 is released from cable container 16, the 13 array 18/20 is free to assume its fully deployed state.
14 Fig. 6 illustrates the horizontal line array 18/20 in its fully deployed state. Array cable 16 18 is suspended from float 12 at the leading end by 17 suspension cable 29 and from float 28 at the trailing 18 end by suspension cable 25. Thus array 18/20 is 19 positioned approximately parallel to the surface of the water and at a predetermined depth below the 21 surface corresponding to the lengths of suspension 22 cables 25 and 29. Array cable 18 is kept in a 23 reasonably taut condition because: (a) leading end 24 float 12 is larger and therefore has more drag area than trailing end float 28, and (b) float 12 drifts in 26 higher current than trailing end drag device 24, which 27 is located deeper where lower current speeds exists.
~ . , .
'~ , . . .
202~202 1 As shown in Fig. 6, it is assumed that the prevailing 2 general current flow is from right to left. The 3 horizontal line array deployment method and system 4 described herein has several distinct advantages over prior art methods and systems. First, it is capable 6 of deploying arrays in a shorter time than if a 7 conventional sequential approach is used. Second, it 8 is easier to package in sonobuoy housings of standard 9 shape and size, enabling standard launching methods and devices to be used. Third, the depth at which the 11 array is deployed is easily controlled and the array 12 may be deployed in shallower water than is possible 13 with the conventional sequential approach. Fourth, 14 the deployed array can remain on station and approximately parallel to the water's surface for an 16 extended time. This permits information to be derived 17 from the horizontal array which is not obtainable from 18 a single transducer or from a vertical array of 19 transducers.
~ _ g _ :
1 Typically, such horizontal array systems 2 comprise a horizontal line array, consisting of a 3 cable having a plurality of transducers mounted 4 thereon at a selected interval, and vertical suspension cables, attached to the leading and 6 trailing ends of the horizontal array cable and 7 including selected motion isolation and drag inducing 8 components. In the prior art, such systems have been 9 deployed sequentially. That is, first the trailing end vertical suspension cable is paid out from the 11 deploying sonobuoy, followed by the array cable, and 12 finally the leading end vertical suspension cable.
13 The system then is allowed to stabilize, with the 14 leading and trailing end suspension cables in a vertical attitude and the array in a horizontal 16 attitude.
17 While the above described deployment 18 method is satisfactory for some applications, other 19 applications require that the transducer array be deployed very rapidly or at a shallow depth. But, the 21 time required for deployment is a function of the 22 length of the horizontal array and the length of the 23 suspension cables, the latter of which also determines 24 the depth at which the array will be deployed. For example, a deployment time of thirty minutes is 26 desirable for some applications. However, due to the 27 length of the array involved and the time required for ~" . . ..
20202~2 1 the array to reach the desired operating depth, the 2 prior art sequential method of deployment has been 3 unable to achieve the desired thirty-minute deployment 4 time.
It is, therefore, an object of the present 6 invention to provide a new and improved system for 7 rapidly deploying a horizontal line array of electro-8 acoustic transducers from a sonobuoy, as well as new 9 sonobuoys employing such system.
SUMMARY OF THE INVENTION
11 In accordance with the present invention 12 there is provided a sonobuoy system for deploying an 13 array of transducers at a predetermined depth below 14 the water surface in predetermined time. The system has a cable having a plurality of transducers attached 16 to it, and a containment means for containing said 17 cable and capable of floating at or near the surface 18 of the water. The system also has a cable control 19 means for causing the trailing end and leading end of the cable to be set at a predetermined depth below the 21 water's surface. When the cable control means 22 selectively releases the trailing end of said cable 23 upon the sonobuoy system being deployed in the water, 24 the cable control means permits the trailing end of the cable to descend to a predetermined depth. When 26 the predetermined depth is reached, the cable is then . , 1 held until the predetermined time has elapsed. After 2 the elapse of the predetermined time, the leading end 3 of the cable is selectively released and allowed to 4 descend to the predetermined depth.
For a better understanding of the present 6 invention, together with other and further objects, 7 reference is made to the following description, taken 8 in conjunction with the accompanying drawings, and its 9 scope will be pointed out in the appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
11 Fig. 1 illustrates a sonobuoy, embodying 12 the invention, in its packaged state, ready for 13 deployment.
14 Fig. 2 illustrates the first phase of deployment of a horizontal line array from the 16 sonobuoy of Fig. 1.
17 Fig. 3 illustrates the beginning of the 18 second phase of deployment.
19 Fig. 4 illustrates the position of the array at the end of the second phase of deployment.
21 Fig. 5 illustrates the third phase of the 22 deployment.
23 Fig. 6 is a view of the invention in its 24 fully deployed state, showing the transducer array in a horizontal position at the desired depth below the 26 surface of the water.
' DESCRIPTION OF THE INVENTION
2 Fig. 1 shows the a sonobuoy 10, typically 3 cylindrical in form, which embodies the invention and 4 is ready for deployment. The sonobuoy is usually 5 launched from a plane or ship by dropping the sonobuoy 6 into the water. If launched from a plane, the 7 sonobuoy housing 22 would normally include means for 8 suitably slowing its descent, such as rotor blades or 9 a parachute, in a manner well known in the art.
The sonobuoy housing 22 includes a surface 11 float 12 that is releasably connected to cable 12 container 16, which houses the leading end array 13 suspension cable. Cable container 16 is preferably 14 cylindrically shaped with the diameter of the cylinder 15 approximately equal to the diameter of the cylindrical 16 portion of the surface float 12. Cable container 16 17 is also releasably attached to array container 19, 18 which contains the array cable and its transducers, 19 and has a diameter corresponding to the diameter of float 12 and cable container 16. Cable container 28, 21 which houses the trailing end suspension cable, also 22 preferably has a cylindrical shape of approximately 23 the same diameter as the other elements and is 24 releasably attached to array container 19.
Fig. 2 shows sonobuoy 10 shortly after it 26 has been dropped into the water. Surface float 12 27 slides out of housing 22, inflates and remains at the . .
1 surface of the water throughout the use of the 2 system. Float 12 includes an antenna 35 and 3 associated electronics, for transmitting information 4 collected by the array of transducers after it is deployed.
6 Cable container 16 slides out of housing 7 22 and drops away from float 12 but remains attached 8 to float 12 by a connecting member 14, which is 9 preferably a compliant cable containing one or more electrical leads carry signals from the array to the 11 electronics package in float 12. Cable container 16 12 contains leading end suspension cable 29, damper 13 device 32 and array electronics package 34. ~he 14 weight of descent housing 22 and cable container 28 causes array cable, having transducers 20 affixed 16 thereto at a selected interval, to be paid out from 17 array container 19. Array container 19 is constructed 18 in separable halves which separate and fall away as 19 shown. Eventually, cable container 28 slides out of housing 22 and the housing falls away as shown in Fig.
21 2.
22 Fig. 3 shows the beginning of the second 23 phase of the deployment of the horizontal line array 24 system. After housing 22 drops away, cable container 28, which is buoyant and contains trailing end 26 suspension cable 25 and drag device 24, is free to 27 float toward the water's surface but remains attached :
, ~ , .. . . : : .
2~2~2~2 1 to array cable 18 via connecting member 26. The 2 combination of floating container 28 and trailing end 3 suspension cable 25 serves to keep the trailing end of 4 the array cable 18 at a predetermined depth below the water's surface determined by the length of cable 25.
6 Since connecting member 26 connects the trailing end 7 of array cable 18 to the combination of drag device 24 8 and the lower end of suspension cable 25 and is not 9 required to provide electrical connection, nylon line or other flexible cable is suitable. Connected 11 between connecting member 26 and the lower end of 12 cable 25 is drag device 24, which may be a drogue.
13 Drag device 24 impedes the drift of the trailing end 14 of array cable 18 relative to float 12, while float 12 is free to drift with the prevailing surface current.
16 This causes cable 18 to be stretched out in an angular 17 configuration as shown in Fig 4.
18 Fig. 4 shows the final position of the 19 line array 18/20 at the end of the second phase of deployment, when the array is deployed to maximum 21 extension. The time required to complete this phase 22 varies depending on the length of the array and 23 suspension cables. At the end of this timed phase, 24 leading end 27 of cable 18 is released from cable container 16 via a preset timing mechanism.
26 Fig. 5 shows the third phase of 27 deployment. Array electronics container 34, which had ~., ' ' .
., 2~202~2 1 been releasably contained within cable container 16, 2 is released and descends with leading end 27 of cable 3 18 attached to it. Container 34 remains connected to 4 cable container 16 by means of leading end suspension cable 29, which may be a compliant cable for example.
6 In order to prevent container 34 from descending too 7 rapidly, which may cause suspension cable 29 to tangle 8 with array cable 18, leading end drag device 32 is 9 attached along suspension cable 29 near container 34.
Drag device 32 thus slows the descent of container 34.
11 After a predetermined length of suspension 12 cable 29 is released from cable container 16, the 13 array 18/20 is free to assume its fully deployed state.
14 Fig. 6 illustrates the horizontal line array 18/20 in its fully deployed state. Array cable 16 18 is suspended from float 12 at the leading end by 17 suspension cable 29 and from float 28 at the trailing 18 end by suspension cable 25. Thus array 18/20 is 19 positioned approximately parallel to the surface of the water and at a predetermined depth below the 21 surface corresponding to the lengths of suspension 22 cables 25 and 29. Array cable 18 is kept in a 23 reasonably taut condition because: (a) leading end 24 float 12 is larger and therefore has more drag area than trailing end float 28, and (b) float 12 drifts in 26 higher current than trailing end drag device 24, which 27 is located deeper where lower current speeds exists.
~ . , .
'~ , . . .
202~202 1 As shown in Fig. 6, it is assumed that the prevailing 2 general current flow is from right to left. The 3 horizontal line array deployment method and system 4 described herein has several distinct advantages over prior art methods and systems. First, it is capable 6 of deploying arrays in a shorter time than if a 7 conventional sequential approach is used. Second, it 8 is easier to package in sonobuoy housings of standard 9 shape and size, enabling standard launching methods and devices to be used. Third, the depth at which the 11 array is deployed is easily controlled and the array 12 may be deployed in shallower water than is possible 13 with the conventional sequential approach. Fourth, 14 the deployed array can remain on station and approximately parallel to the water's surface for an 16 extended time. This permits information to be derived 17 from the horizontal array which is not obtainable from 18 a single transducer or from a vertical array of 19 transducers.
~ _ g _ :
Claims (8)
- Claim 1. A sonobuoy system for deploying an array of transducers in a substantially horizontal line at a predetermined depth below the surface of a body of water having prevailing surface and subsurface currents, comprising:
an array cable having a plurality of transducers affixed thereto, and having a leading end and a trailing end;
means for suspending the leading end of said array cable at a predetermined depth below the surface of said water;
means for suspending the trailing end of said array cable at a predetermined depth below the surface of said water and for impeding the drift of said trailing end relative to said leading end;
means for controlling the deployment of said array cable and said suspension means;
wherein, said control means releases the trailing end of said array cable and said trailing end suspension means after said sonobuoy system is deposited in the water, permitting said trailing end to descend until said predetermined depth is reached while restraining the leading end of said cable until a first predetermined time has elapsed, then releasing the leading end of said array cable after said first predetermined time has elapsed, allowing the leading end of said array cable to descend to said predetermined depth. - Claim 2. The system of Claim 1, wherein said leading and trailing end suspension means each includes means having sufficient buoyancy to support its respective end of the array cable.
- Claim 3. The system of Claim 2, wherein said trailing end suspension means includes a suspension member coupled between the trailing end of said array cable and the associated buoyant means, said trailing end suspension member being of sufficient length to suspend the trailing end of said array cable from the associated buoyant means at said predetermined depth.
- Claim 4. The system of Claim 3, wherein said trailing end suspension means further includes a drag inducing member coupled to the trailing end of said array cable for impeding the drift of said trailing end relative to the buoyant means associated with the leading end of said array cable and therefore said leading end.
- Claim 5. The system of Claim 4, wherein said leading end suspension means includes a suspension member coupled between the leading end of said array cable and the associated buoyant means, said leading end suspension member being of sufficient length to suspend the leading end of said array cable from the associated buoyant means at said predetermined depth.
- Claim 6. The system of Claim 5, wherein said leading end suspension means also includes a drag inducing member coupled between said leading end suspension member and the leading end of said array cable, for slowing the descent of said leading end after said leading end is released by said control means.
- Claim 7. The system of Claim 6, wherein the buoyant means associated with the leading end of said array cable includes means for transmitting information derived from the transducers which are part of said array cable, and wherein said leading end suspension means includes means for translating information from said array to said transmitting means.
- Claim 8. A method for deploying from a sonobuoy in a body of water an array of transducers in a substantially horizontal line at a predetermined depth in the water, comprising the steps of:
(1) releasing the trailing end of said array from said sonobuoy and allowing said end to decend in said water;
(2)suspending said trailing end at said predetermined depth while imposing horizontally oriented drag thereon, thereby causing said array to initially assume an angular configuration relative to the surface of said water;
(3) releasing the leading end of said array while imposing vertically oriented drag thereon, thereby allowing said end to descend slowly, and suspending said leading end at said predetermined depth;
whereby the drag acting on the trailing end of said array will eventually extend said array in a substantially horizontal line at said predetermined depth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US38348589A | 1989-07-24 | 1989-07-24 | |
| US07/383,485 | 1989-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2020202A1 true CA2020202A1 (en) | 1991-01-25 |
Family
ID=23513381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2020202 Abandoned CA2020202A1 (en) | 1989-07-24 | 1990-06-29 | System for deploying horizontal line array |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0410591A3 (en) |
| JP (1) | JPH03122583A (en) |
| AU (1) | AU625999B2 (en) |
| CA (1) | CA2020202A1 (en) |
| NZ (1) | NZ234388A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109283513B (en) * | 2018-08-31 | 2021-02-26 | 杭州瑞声海洋仪器有限公司 | Static array arrangement structure and method for testing on towed linear array lake |
| FR3103571B1 (en) * | 2019-11-27 | 2021-10-22 | Thales Sa | SONAR DEVICE |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3944964A (en) * | 1973-12-19 | 1976-03-16 | The United States Of America As Represented By The Secretary Of The Navy | Air dropped linear acoustic detector |
| US4004265A (en) * | 1974-08-02 | 1977-01-18 | Sanders Associates, Inc. | Self-propelled array system |
| US3973236A (en) * | 1974-12-23 | 1976-08-03 | Lockheed Missiles & Space Company, Inc. | Horizontal hydrophone array |
| US4571788A (en) * | 1983-11-21 | 1986-02-25 | Hazeltine Corporation | Double action pressure release |
-
1990
- 1990-06-29 CA CA 2020202 patent/CA2020202A1/en not_active Abandoned
- 1990-07-03 EP EP19900307280 patent/EP0410591A3/en not_active Withdrawn
- 1990-07-04 AU AU58670/90A patent/AU625999B2/en not_active Ceased
- 1990-07-05 NZ NZ23438890A patent/NZ234388A/en unknown
- 1990-07-24 JP JP2196019A patent/JPH03122583A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0410591A3 (en) | 1992-07-01 |
| AU5867090A (en) | 1991-01-24 |
| EP0410591A2 (en) | 1991-01-30 |
| AU625999B2 (en) | 1992-07-23 |
| NZ234388A (en) | 1992-03-26 |
| JPH03122583A (en) | 1991-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4004265A (en) | Self-propelled array system | |
| US4189703A (en) | System for deploying a sensor array from transiting vessel | |
| US3886491A (en) | Expandable sonar array | |
| US3880103A (en) | Tethered mine hunting system | |
| US3921120A (en) | Float actuated release mechanism | |
| AU2012296711B2 (en) | Communication buoy and method of deployment | |
| US4208738A (en) | Deployable sonar array with interconnected transducers operated in the bending mode | |
| US5566908A (en) | Air-launchable gliding sonobuoy | |
| US3944964A (en) | Air dropped linear acoustic detector | |
| US6400645B1 (en) | Sonobuoy apparatus | |
| US5056065A (en) | System for deploying horizontal line array | |
| CA2057898C (en) | Sonar array mounting for sonobuoy | |
| CA2422421C (en) | Airdrop type buoy apparatus | |
| US3724817A (en) | Long line loiter technique | |
| EP0410591A2 (en) | System for deploying horizontal line array | |
| US3946695A (en) | Self-deploying multiple anchor mooring systems | |
| US4654832A (en) | Sonobuoy retaining and release apparatus | |
| US3646505A (en) | Automatically deployable sonobuoy | |
| US5469407A (en) | Parachute array | |
| US5175712A (en) | Underwater sound source with timed actuator | |
| EP4023542A1 (en) | Surface deployed communication buoy | |
| US4853900A (en) | Stabilized suspension for immersible apparatus | |
| US6052332A (en) | Countermeasure flexible line array | |
| CA1050150A (en) | Self propelled array system | |
| US5398214A (en) | Pressure responsive clasp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |