US3859949A - Envelope for underwater cable, drag ropes or the like - Google Patents

Envelope for underwater cable, drag ropes or the like Download PDF

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Publication number
US3859949A
US3859949A US292917A US29291772A US3859949A US 3859949 A US3859949 A US 3859949A US 292917 A US292917 A US 292917A US 29291772 A US29291772 A US 29291772A US 3859949 A US3859949 A US 3859949A
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United States
Prior art keywords
strips
jacketing
strip
recesses
cable
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Expired - Lifetime
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US292917A
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English (en)
Inventor
Dietrich Toussaint
Frank Meyer
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Vereinigte Flugtechnische Werke Fokker GmbH
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Vereinigte Flugtechnische Werke Fokker GmbH
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Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
    • B63B21/56—Towing or pushing equipment
    • B63B21/66—Equipment specially adapted for towing underwater objects or vessels, e.g. fairings for tow-cables
    • B63B21/663—Fairings

Definitions

  • ABSTRACT Cable and drag rope jackets are constructed from snapped together strips having streamline profile, and joints only at the leading and trailing edges of the profile. Each strip has recesses which mutually cover each other upon assembly to receive one or more cables or a rope.
  • an elongated element with circular cross-section offers resistance to fluid flow (transverse to its extension) which depends primarily on the diameter of the element, the square of the fluid velocity, and a coefficient of resistance which depends on the contour of the cross-section of the element.
  • the diameter of, for example, a drag rope is chosen primarily on basis of the load the rope has to take up and pull. Thus, the diameter is not available as parameter for selecting or modifying the flow resistance of the rope.
  • Fluid flow velocity is, of courses, an external condition to be met and not a selectible parameter. The only parameter left for control is the coefficient of resistance.
  • Some cable jackets are known which are constructed in (longitudinal) sections, and the sections are interconnected through appropriate fittings.
  • the joints of the sections are invariably regions of increased flow resistance. Such increase becomes noticeable for long ropes or cables.
  • objects may lodge in the joints, increasing the flow resistance further and adding to the load.
  • the problem is compounded by the fact that the known constructions for sectioning cables provide joints at hydrodynamically unfavorable locations.
  • sectionalized jacketing does not eliminate the storage problem entirely, as the jacket sections have to be stored too. Also, the rather loose connections between sections sets up the tendency for fluttering which, of course, adds significantly to the effective flow resistance.
  • each strip-like part of complementary configuration each having first flat surface and plane to be placed in abutment with the first flat surface of the respective other strip, and when so placed the now common surface planes define a plane of symmetry.
  • Each part has a second surface, and the second surfaces together define a streamline profile with stagnation points for the flow at exposed lines of jointure of the two strips.
  • the first surfaces may actually be developed in isolated areas only, as the surface contour is interrupted and provided with recesses, open to the respective first surface, to receive the rope, cable or several thereof such as a rope, a power supply cable and/or signal transmission cable or cables.
  • the mutually facing recesses define an elongated cavity or cavities that extend over the entire length of the assembled jacket.
  • the first surfaces are additionally provided with fastening means for releasably securing the strips to each other.
  • the fastening means may have construction of plastic zippers established by snap-action grooves and mating ridges for coaction with the ridges and grooves in the respective other strip part. The snap action is to provide some pressure for forcing the parts against each other.
  • the strip parts may define additional internal cavities for receiving equipment.
  • the parts themselves may be compartmentized to define hollow but closed cavities for obtaining some buoyancy.
  • the semi-fluid-dynamic strip parts are preferably made of an elastic material, preferably plastic.
  • plastic In the case of a skeleton structure for the strips with buoyancy defining cavities, one will preferably use fiber reinforced plastic.
  • the jacket In the case of a fiber reinforced plastic, the jacket may have also the function of the load bearing part of an electrical cable.
  • the recesses for the rope or for the main rope or cable should be provided in the forward portion of the strips (forward in terms of expected position to oncoming flow when assembled and submerged).
  • the principal load" in the jacket should be in the forwardmost quarter portion thereof.
  • Using one or several cables together with a separate rope in a simple two-part jacket permits rather accurate balancing of the structure.
  • the various ropes and cables can be distributed in the jacket by providing the receiving recesses in the first surfaces, so that the jacketed cable will readily balance in oncoming external flow.
  • FIG. 1 is a cross-section through a jacket for a drag rope with a cable core in accordance with a first example for practicing the preferred embodiment of the invention
  • FIG. 2a is an elevation of the surface of one strip element to be used with another as jacket for a rope and for a separate cable in accordance with a second exam- P
  • FIG. 2b is a section view along lines IIII in FIG. 2a;
  • FIGS. 3a and 3b are cross-sections of jackets with internal provisions for different cables, ropes, etc.;
  • FIG. 4 is a cross-section through a jacketed drag rope with skeleton and compartmentized structure for the two profile parts as joined;
  • FIG. 5 is a cross-section through a jacketed cable, wherein the jacket has also the function of a load bearing element.
  • FIG. 1 illustrates cable and rope jacket parts having configuration of strips 1 and 2 with complementary profile.
  • Each strip has a flat surface 11 and 12, respectively, and the flat surfaces of the two sections abut in the completed jacket.
  • Each strip has a smoothly curved, second surface, 13 and 14, respectively.
  • the outer surface of the jacket as a whole has streamlined configuration and is symmetrical to the plane of the abutting surfaces 11 and 12 which lie in a common plane.
  • the streamlined configuration is chosen to ensure laminar flow along the outer contour, without separation under the expected flow conditions.
  • the assembled jacket structure offers two joints to external flow.
  • the joints 15 and 16 are disposed in the common plane of symmetry and, thus, they appear in stagnation points of any flow into whose direction the jacket will orient itself when submerged.
  • the flat surface 11 of strip 1 is provided with two longitudinally extending snap ridges 3 and 5 as well as with a groove in complementary fashion for engagement with a ridge 4 which extends from strip 2.
  • Complementary snap-action (overhung) grooves are provided in part 2 for receiving the bead-like overhung ridges 3 and 5 of part 1.
  • a semicircular groove is provided in each strip near the respective front of its flat surface and respectively denoted la and 2a for the strips 1 and 2. Together, i.e., in the assembled configuration of the jacket, grooves la and 2a establish a circular-tubular space which extends along the entire interior of the strips and jacket.
  • a long rope 6 is loosely received in the cavity la-2a.
  • a power supply cable 7 or the like is disposed in the interior of rope 6 and constitutes a part thereof.
  • the inner diameter of cavity 1a-2a should be slightly larger than the outer diameter of rope 6, so that any twist in the latter will not lead to binding, but such twist may be eliminated.
  • FIG. 1 shows the location of the cavities 1a and 2a, so that the center of gravity of the jacket runs through the center line of the resulting circular cavity, so that the center of gravity of the assembled jacket coincides with the center of gravity of the drag rope and of the cable itself. This way, the tendency for flutter is significantly reduced or eliminated entirely.
  • FIG. 1 shows a drag rope as combined with an electrical cable.
  • drag rope and power supply and/or signal cable or cables are furnished separately.
  • the invention permits ready accommodation to such plural elements, and establishes a common jacket.
  • the one strip 1 has snap-action grooves 3a-5a and snap-action ridge 4 as before, for connection to a complementary strip 2'.
  • drag rope 6 and cable 7 are provided and, therefore, positioned separately in separate, semicircular grooves as to each jacket strip.
  • FIG. 3a shows another configuration as far as using available space is concerned.
  • a cavity such as 8 may be provided to accommodate individual pieces of equipment, such as measuring transducers, etc. These cavities 8 are established by individual recesses in each strip which do not extend over the entire length of the strips and, thus, cavities 8 define individual compartments.
  • FIG. 3a shows also additional snap-action ridges and grooves. Actually, the recesses for the cable 7 are disposed in relation to two ridges and two grooves, so that the cable cooperates in the snap action for locking the two parts 1" and 2" to each other.
  • FIG. 3b shows how a number of different cables can readily be accommodated, such as a power supply cable 7 and separate signaling cables 10, and they are all separated from the drage rope 6'.
  • FIG. 4 illustrates a construction on basis of skeleton structure for strip parts 21 and 22.
  • Each part has extensive cavities 9 which may be filled with light material so as to provide some buoyancy to the cable support structure.
  • the cavities 9 may be filled, for example, with some foam material or the like.
  • the strips 21 and 22 are preferably made of glass carbon or metal fiber reinforced plastic, so that the hollow jacket has sufficient strength.
  • the embodiment shown in FIG. 5 may use also, for example, glass carbon or metal fiber reinforced plastic for the envelope of the cable.
  • the cable jacket itself may serve here as load bearing drag rope.
  • the jackets can be sectionalized for long cables or ropes if deemed appropriate for reasons of storage.
  • Coupling elements may be inserted in lateral cavities in the section end faces of the jackets to effect a smooth joint between adjacent sections.
  • strip parts such as l, 2, 1", 2", etc.
  • the ropes and cables can be stored on still different drums.
  • these drums are reeled separately.
  • the cable or cables and/or rope are run into the respective recesses in what will become the inner interface of the two strip parts.
  • the ridges such as 3, 4, 5, etc., are forced into the respective mating grooves to obtain the complete jacket.
  • Such a jacket cable may at times be disassembled; for this, the jacket strips are wedged apart, and strips and rope andlor cables as now released are reeled on separate drums.
  • Jacketing for underwater cables, ropes, drag ropes, etc. with streamline profile comprised of two completely separable profiled strips for individual reeling, each having a first surface to be placed into abutment with the first surface of the respective other first strip and each strip having a second surface disposed symmetrical to a plane defined by the first surfaces when placed in abutment to each other, to establish a streamline profile, resulting joints between the strips as exposed extending along leading and trailing edges of the streamline profile;
  • the strips each having at least one recess open to the first surface, the recesses having location and contour complementary to each other to define an elongated cavity for loosely receiving the rope or cable when the first surfaces are in mutual abutment;
  • first fastening means on the strips in the first surfaces thereof for releasably interconnecting the two strips between the cavity and the leading edge of the profile;
  • second fastening means on the strips in the first surfaces thereof for releasably interconnecting the two strips between the cavity and the trailing edge of the profile.
  • the fastening means each including overhung ridges and mating overhung grooves in and of the first surfaces and in complementary configuration to each other.
  • the first fastening means including an overhung groove in a first one of the two strips and a mating overhung ridge on the other one of the two strips
  • the second fastening means including an overhung groove in the other strip and a mating overhung ridge on the first strip.
  • Jacketing as in claim 10 the strips made of fiber reinforced plastic.
  • Jacketing as in claim 1 the jacket reducing in cross-section throughout its length.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Ropes Or Cables (AREA)
  • Electric Cable Installation (AREA)
US292917A 1971-10-05 1972-09-28 Envelope for underwater cable, drag ropes or the like Expired - Lifetime US3859949A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712149592 DE2149592A1 (de) 1971-10-05 1971-10-05 Stroemungsguenstige verkleidung, insbesondere fuer unterwasserkabel

Publications (1)

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US3859949A true US3859949A (en) 1975-01-14

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US292917A Expired - Lifetime US3859949A (en) 1971-10-05 1972-09-28 Envelope for underwater cable, drag ropes or the like

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US (1) US3859949A (enExample)
CA (1) CA966015A (enExample)
DE (1) DE2149592A1 (enExample)
FR (1) FR2155509A5 (enExample)
GB (1) GB1403758A (enExample)

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033279A (en) * 1976-02-27 1977-07-05 Sea-Log Corporation Faired cable for anchoring offshore structures
US4398487A (en) * 1981-06-26 1983-08-16 Exxon Production Research Co. Fairing for elongated elements
US4473024A (en) * 1981-09-21 1984-09-25 Armstrong Douglas C Self-locking covering device for standing rigging
US4474129A (en) * 1982-04-29 1984-10-02 W. R. Grace & Co. Riser pipe fairing
US5335620A (en) * 1993-03-31 1994-08-09 The United States Of America As Represented By The Secretary Of The Navy Protective fairing for underwater sensor line array
US5367971A (en) * 1992-03-12 1994-11-29 Australian Sonar Systems Pty Ltd. Towed acoustic array
US5456199A (en) * 1992-03-30 1995-10-10 Kernkamp; Willem J. A. Fluid drag reducing apparatus
WO1998053176A3 (en) * 1997-05-22 1999-02-25 Apex Tubulars Ltd Marine riser
US6401646B1 (en) * 2000-09-14 2002-06-11 Aims International, Inc. Snap-on rotating reduction fairing
US6634273B2 (en) 2001-05-15 2003-10-21 Edo Corporation Open loop minesweeping system
US6669408B1 (en) * 2002-05-13 2003-12-30 The United States Of America As Represented By The Secretary Of The Navy Self-orienting piling, fluid-flow reduction device
US20080035043A1 (en) * 2006-08-09 2008-02-14 Viv Suppression,Inc. Twin fin fairing
US20080188150A1 (en) * 2006-01-20 2008-08-07 Hine Roger G Wave power components
US20090289148A1 (en) * 2008-05-23 2009-11-26 Makani Power, Inc. Faired tether for wind power generation systems
WO2010084520A1 (en) 2009-01-23 2010-07-29 Sequoia Automation S.R.L. Tether for tropospheric aeolian generator
US20100190394A1 (en) * 2007-03-02 2010-07-29 Hine Roger G Wave power
US20110266395A1 (en) * 2010-03-15 2011-11-03 Bevirt Joeben Tether sheaths and aerodynamic tether assemblies
US8096253B1 (en) * 2010-02-05 2012-01-17 The United States Of America As Represented By The Secretary Of The Navy Cable fairing attachment
US8376790B2 (en) 2006-01-20 2013-02-19 Liquid Robotics Inc. Wave power
US20130220202A1 (en) * 2012-02-23 2013-08-29 Pgs Geophysical As Method and System of a Marine Fairing
US20130312649A1 (en) * 2010-09-20 2013-11-28 Julek Romuald Tomas Apparatus for gripping a chain
US8764498B2 (en) 2011-03-17 2014-07-01 Liquid Robotics, Inc. Wave-powered device with one or more tethers having one or more rigid sections
US8808041B2 (en) 2011-06-28 2014-08-19 Liquid Robotics, Inc. Watercraft that harvest both locomotive thrust and electrical power from wave motion
US8825241B2 (en) 2011-03-17 2014-09-02 Liquid Robotics, Inc. Autonomous wave-powered substance distribution vessels for fertilizing plankton, feeding fish, and sequestering carbon from the atmosphere
US8944866B2 (en) 2011-09-15 2015-02-03 Liquid Robotics, Inc. Wave-powered endurance extension module for unmanned underwater vehicles
US9151267B2 (en) 2006-05-18 2015-10-06 Liquid Robotics, Inc. Wave-powered devices configured for nesting
CN103748311B (zh) * 2011-06-14 2016-06-29 越洋塞科外汇合营有限公司 整装式海底取油管整流罩
US9524646B2 (en) 2011-03-17 2016-12-20 Liquid Robotics, Inc. Navigation of a fleet of autonomous vessels in current and wind
USRE48123E1 (en) 2006-08-09 2020-07-28 Asset Integrity Management Solutions, L.L.C. Twin fin fairing
US10890272B1 (en) * 2019-08-30 2021-01-12 VIV Solutions LLC U-shaped fairing with hinged blocks
CN114013571A (zh) * 2021-11-15 2022-02-08 国家海洋技术中心 一种用于波浪滑翔机的柔性翼和波浪滑翔机

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1168520A (en) 1980-06-23 1984-06-05 Robert S. Norminton One-piece, snap-on, foil-shaped, low-drag fairing for long underwater cables
DE4226614C2 (de) * 1992-08-08 2003-02-13 Stiftung A Wegener Inst Polar Anordnung zur stationären Positionierung von Meßgeräten in Wasserströmungen
MXPA02009190A (es) 2000-03-20 2004-09-06 Francois Bernard Aparato y metodo para desplegar un objeto bajo el agua.

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435956A (en) * 1942-12-09 1948-02-17 Edward C Craig Streamlined conductor cable
US3078202A (en) * 1956-06-01 1963-02-19 August T Bellanca Type of construction
US3440993A (en) * 1967-12-26 1969-04-29 Us Navy Cable fairing
US3443020A (en) * 1967-11-22 1969-05-06 Uniroyal Inc Faired cable
US3611976A (en) * 1968-11-23 1971-10-12 Fathom Oceanology Ltd Low-drag fairing configuration for flexible towing cables

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2435956A (en) * 1942-12-09 1948-02-17 Edward C Craig Streamlined conductor cable
US3078202A (en) * 1956-06-01 1963-02-19 August T Bellanca Type of construction
US3443020A (en) * 1967-11-22 1969-05-06 Uniroyal Inc Faired cable
US3440993A (en) * 1967-12-26 1969-04-29 Us Navy Cable fairing
US3611976A (en) * 1968-11-23 1971-10-12 Fathom Oceanology Ltd Low-drag fairing configuration for flexible towing cables

Cited By (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4033279A (en) * 1976-02-27 1977-07-05 Sea-Log Corporation Faired cable for anchoring offshore structures
US4398487A (en) * 1981-06-26 1983-08-16 Exxon Production Research Co. Fairing for elongated elements
US4473024A (en) * 1981-09-21 1984-09-25 Armstrong Douglas C Self-locking covering device for standing rigging
US4474129A (en) * 1982-04-29 1984-10-02 W. R. Grace & Co. Riser pipe fairing
US5367971A (en) * 1992-03-12 1994-11-29 Australian Sonar Systems Pty Ltd. Towed acoustic array
US5456199A (en) * 1992-03-30 1995-10-10 Kernkamp; Willem J. A. Fluid drag reducing apparatus
US5335620A (en) * 1993-03-31 1994-08-09 The United States Of America As Represented By The Secretary Of The Navy Protective fairing for underwater sensor line array
WO1998053176A3 (en) * 1997-05-22 1999-02-25 Apex Tubulars Ltd Marine riser
US6401825B1 (en) 1997-05-22 2002-06-11 Petroleum Equipment Supply Engineering Company Limited Marine riser
EP1310630A1 (en) * 1997-05-22 2003-05-14 Petroleum Equipment Supply Engineering Company Limited Fairing for a marine riser
US6401646B1 (en) * 2000-09-14 2002-06-11 Aims International, Inc. Snap-on rotating reduction fairing
US6634273B2 (en) 2001-05-15 2003-10-21 Edo Corporation Open loop minesweeping system
US6669408B1 (en) * 2002-05-13 2003-12-30 The United States Of America As Represented By The Secretary Of The Navy Self-orienting piling, fluid-flow reduction device
US10150545B2 (en) 2006-01-20 2018-12-11 Liquid Robotics, Inc. Wave power
US20080188150A1 (en) * 2006-01-20 2008-08-07 Hine Roger G Wave power components
US9051037B2 (en) 2006-01-20 2015-06-09 Liquid Robotics, Inc. Wave power
US9623945B2 (en) 2006-01-20 2017-04-18 Liquid Robotics Inc. Wave power
US8287323B2 (en) 2006-01-20 2012-10-16 Liquid Robotics, Inc Wave power components
US8376790B2 (en) 2006-01-20 2013-02-19 Liquid Robotics Inc. Wave power
US10041466B2 (en) 2006-05-18 2018-08-07 Liquid Robotics, Inc. Wave-powered devices configured for nesting
US9151267B2 (en) 2006-05-18 2015-10-06 Liquid Robotics, Inc. Wave-powered devices configured for nesting
US20080035351A1 (en) * 2006-08-09 2008-02-14 Viv Suppression, Inc. Twin Fin Fairing
US7337742B1 (en) 2006-08-09 2008-03-04 Viv Suppression, Inc. Twin fin fairing
US7513209B2 (en) 2006-08-09 2009-04-07 Seahorse Equipment Corporation Twin fin fairing
USRE48123E1 (en) 2006-08-09 2020-07-28 Asset Integrity Management Solutions, L.L.C. Twin fin fairing
US20080035043A1 (en) * 2006-08-09 2008-02-14 Viv Suppression,Inc. Twin fin fairing
US9789944B2 (en) 2007-03-02 2017-10-17 Liquid Robotics, Inc. Cable for connecting a float to a swimmer in a wave powered vehicle
CN101622173B (zh) * 2007-03-02 2013-03-27 里奎德机器人技术公司 水上载体
US11685494B2 (en) 2007-03-02 2023-06-27 Liquid Robotics, Inc. Method and apparatus for untwisting a tether of a water powered vehicle
US8668534B2 (en) 2007-03-02 2014-03-11 Liquid Robotics, Inc Wave power
US11027810B2 (en) 2007-03-02 2021-06-08 Liquid Robotics, Inc. Float for connection to a swimmer in a wave powered vehicle
US10315746B2 (en) 2007-03-02 2019-06-11 Liquid Robotics, Inc. Cable for connecting a float to a swimmer in a wave powered vehicle
US20100190394A1 (en) * 2007-03-02 2010-07-29 Hine Roger G Wave power
US20090289148A1 (en) * 2008-05-23 2009-11-26 Makani Power, Inc. Faired tether for wind power generation systems
WO2010084520A1 (en) 2009-01-23 2010-07-29 Sequoia Automation S.R.L. Tether for tropospheric aeolian generator
US8539746B2 (en) 2009-01-23 2013-09-24 Kite Gen Research S.R.L. Tether for tropospheric aeolian generator
US8096253B1 (en) * 2010-02-05 2012-01-17 The United States Of America As Represented By The Secretary Of The Navy Cable fairing attachment
US20110266395A1 (en) * 2010-03-15 2011-11-03 Bevirt Joeben Tether sheaths and aerodynamic tether assemblies
US8893636B2 (en) * 2010-09-20 2014-11-25 Subsea 7 Limited Apparatus for gripping a chain
US20130312649A1 (en) * 2010-09-20 2013-11-28 Julek Romuald Tomas Apparatus for gripping a chain
US9524646B2 (en) 2011-03-17 2016-12-20 Liquid Robotics, Inc. Navigation of a fleet of autonomous vessels in current and wind
US8764498B2 (en) 2011-03-17 2014-07-01 Liquid Robotics, Inc. Wave-powered device with one or more tethers having one or more rigid sections
US8825241B2 (en) 2011-03-17 2014-09-02 Liquid Robotics, Inc. Autonomous wave-powered substance distribution vessels for fertilizing plankton, feeding fish, and sequestering carbon from the atmosphere
US9802681B1 (en) 2011-03-17 2017-10-31 Liquid Robotics, Inc. Autonomous wave-powered vessels and fleets for managing fish stock
CN103748311B (zh) * 2011-06-14 2016-06-29 越洋塞科外汇合营有限公司 整装式海底取油管整流罩
US10549832B2 (en) 2011-06-28 2020-02-04 Liquid Robotics, Inc. Watercraft equipped with a hybrid wave-powered electricity generating and propulsion system
US10150546B2 (en) 2011-06-28 2018-12-11 Liquid Robotics, Inc. Watercraft equipped with a hybrid wave-powered electricity generating and propulsion system
US9688373B2 (en) 2011-06-28 2017-06-27 Liquid Robotics, Inc. Watercraft equipped with a wave-powered electricity generating system and a deployable tow buoy
US8808041B2 (en) 2011-06-28 2014-08-19 Liquid Robotics, Inc. Watercraft that harvest both locomotive thrust and electrical power from wave motion
US11192621B2 (en) 2011-06-28 2021-12-07 Liquid Robotics, Inc. Watercraft and electricity generator system for harvesting electrical power for wave motion
US9353725B2 (en) 2011-06-28 2016-05-31 Liquid Robotics, Inc. Watercraft and electricity generator system for harvesting electrical power from wave motion
US8944866B2 (en) 2011-09-15 2015-02-03 Liquid Robotics, Inc. Wave-powered endurance extension module for unmanned underwater vehicles
US8826842B2 (en) * 2012-02-23 2014-09-09 Pgs Geophysical As Method and system of a marine fairing
US20130220202A1 (en) * 2012-02-23 2013-08-29 Pgs Geophysical As Method and System of a Marine Fairing
US10890272B1 (en) * 2019-08-30 2021-01-12 VIV Solutions LLC U-shaped fairing with hinged blocks
CN114013571A (zh) * 2021-11-15 2022-02-08 国家海洋技术中心 一种用于波浪滑翔机的柔性翼和波浪滑翔机

Also Published As

Publication number Publication date
FR2155509A5 (enExample) 1973-05-18
DE2149592A1 (de) 1973-04-12
GB1403758A (en) 1975-08-28
CA966015A (en) 1975-04-15

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