Abstract: A barrier member for an oil spill barrier configured for retaining one or more weights when assembled or combined with a second barrier member to form a barrier unit. A first barrier member has a first side for facing away from the second barrier member and a second side opposite the first side for facing towards the second barrier member in the barrier unit, the second side includes a substantially planar area for abutment to the second barrier member. The second side has at least one recessed region for receiving the one or more weights, the recessed region being recessed from the second side in a direction towards the first side relative to a plane of the substantially planar area. The second side has first and second elongate half-channels disposed to opposing sides of the at least one recessed region.

Abstract: A floating marine barrier is provided whose main components all have substantially equal elastic characteristics, enabling the barrier to better absorb and arrest an impacting vessel. Embodiments include a floating marine barrier including barrier modules each having a flotation device, a supporting framework attached to the flotation device, and impact net support posts attached to the supporting framework. An impact net is attached to each of the support posts and extends between the barrier modules along a longitudinal axis of the barrier; and a main tension strength element is attached to each of the barrier modules and extends between the barrier modules along the longitudinal axis of the barrier to space the barrier modules from each other. The impact net has a first elasticity, and the first main tension strength element has a second elasticity which is substantially equal to the first elasticity.

Abstract: A containment device including a dry curtain, adapted to be deployed for the containment or re-containment of a discharge area, such as an opening, e.g. a door, in response to an explosion. The device includes a ballast bar in the lower portion of the curtain, the ballast bar including cylinders of high-density foam alternated with cylinders of compressible low-density foam.

Abstract: According to the invention, a security net can be erected in or on water or on the ground and is provided with a net or net-like structure (1) manufactured substantially from wire material, rope material, strand material or plastics material (2). The net (1) is bent together and forms longitudinal flanks (3, 4) and at least one arched region (5). The overlapping longitudinal flanks (3, 4) can be connected together and several stabilizers (8) are associated with the net (1). In cross-section, the net (1) is constructed similarly to a teardrop, with the arched region (5) lying on or at least partially in the water. In this way, a largely double-walled security system is obtained, which is able to intercept impacting objects reliably and moreover gently, because the net and the three-dimensional protective net structure is deformable due to the relative flexibility thereof.

Abstract: The present invention generally relates to containment and control of an oil spill caused by a damaged or broken riser in deepwater. More specifically, the present invention relates to a reusable unit that will contain oil spills to a specific location and will also allow oil to be harvested as it flows to the top of the unit while minimizing or even eliminating any environmental clean-up cost. The unit of the present invention is dropped over a damaged or broken riser in a closed positin, the unit is released and stabilized in sections until the surface is reached and the containment unit is completely erected.

Abstract: A number of individual barrier units form a floating barrier wall each comprising a housing formed in the general shape of a highway barrier having a top wall, a bottom wall, opposed end walls, and, opposed side walls interconnected to form a hollow interior which is preferably partially or completely filled with a foam material. A ballast weight is secured to each barrier unit, either inside or outside of the hollow interior, to maintain them in an upright position in the water. Cables, couplers and/or other connectors are employed to mount adjacent barrier units end-to-end to form a barrier wall which can encircle a vessel or otherwise isolate an area within a seaport or other body of water to provide security.

Abstract: A number of individual barrier units form a floating barrier wall each comprising a housing formed in the general shape of a highway barrier having a top wall, a bottom wall, opposed end walls, and, opposed side walls interconnected to form a hollow interior which is preferably partially or completely filled with a foam material. A ballast weight is secured to each barrier unit, either inside or outside of the hollow interior, to maintain them in an upright position in the water. Cables, couplers and/or other connectors are employed to mount adjacent barrier units end-to-end to form a barrier wall which can encircle a vessel or otherwise isolate an area within a seaport or other body of water to provide security.

Abstract: A system for building up land in a water-covered or water-surrounded area has a plurality of floating boom segments connected end-to-end in an essentially closed shape, each boom segment having a sieve panel with a height approximately equal to the depth of the water in the water-covered area and made from water-permeable, fine-meshed material, and each sieve panel having an anchor segment attached to the lower portion of the sieve panel. The system also includes a sediment source depositing sediment inside the area essentially enclosed by the essentially closed shape formed by the boom segments. Preferably a wasteweir segment is disposed so as to close the essentially closed shape formed by the floating boom segments, the wasteweir segment having an essentially U-shaped orthogonal frame of a height at least about equal to the depth of the water in the water-covered area. The wasteweir segment also includes barriers that attach to the frame.

Abstract: A system for collecting oil on water comprises an oil boom (1) and a floating collection container (2), which is connected to an opening (4) in the boom by a pumping hose (3). The pumping hose (3) is flexible so that it can follow the wave motions of the water and is provided with non-return valves, making the flow (18) in the pumping hose unidirectional. The distance between the opening (4) in the boom and the collection container (2) is adjustable by tension members (8) in order for the excess length or slack in the pumping hose (3) to be adjusted to the prevailing wave height or length conditions.

Abstract: The transportable, foldable protective barrier, especially against high water, contains a series of supports of supporting elements articulately joined with one another, a number of parallel pipe rods for the joining of the supports as well as a number of reinforcement filling elements for the bridging of the gaps between the pipe rods. The supports are unfolded into bracing triangles and joined with the pipe rods which span a plane which are completed by grids or panels as reinforcement filling elements. Over the supports and the reinforcement filling elements panels are laid in the event of (a need for) high water protection.

Abstract: The present invention relates to an arrangement for a floating body consisting of containers made from a flexible material positioned laterally in relation to one another and capable of being filled with air or other gas. Containers thereby communicate with one another via a duct extending outside the aforementioned containers and along the floating body, which duct is situated at a level below the surface of the water in which the floating body is adapted to float in its inflated state.

Abstract: A method for maintaining the position of a containment boom in a fast flowing waterway. Firstly, providing an elongate containment boom having a first side, a second side, a first end, a second end and a longitudinal axis. The containment boom consists of a plurality of smaller substantially coaxial boom sections. Secondly, providing a plurality of floats having floating deflector appendages. Thirdly, placing the plurality of floats at spaced intervals along the containment boom between the boom sections, with the floating deflector appendage of each float oriented on the first side of the containment boom extending outwardly at an angle in relation to the longitudinal axis and pointing generally toward the second end.

Abstract: A system for coupling synthetic boomsticks having a pair of spaced parallel substantially horizontal coupling flanges projecting axially therefrom. The flanges form a loop receiving space therebetween and a coupling pin passes through this space between the flanges to lock a loop therein. The coupling pin is lockable in closed position to hold loop in place. A coupling pin and slot prevents rotation of the coupling pin except when the coupling pin is in retracted open position.

Abstract: A spill retention boom is formed of a tubular mesh with an integral rib and filled with an absorbent material.

Abstract: A barrier assembly is provided for protecting shorelines and structures adjacent shorelines from damage attributable to oil spills. The barrier assembly includes a flexible sheet material that is impermeable to oil. One surface of the flexible sheet material may also have oil-absorbing characteristics. Each sheet has a top edge from which tie downs extend for securing sheets to structures adjacent the shoreline. Each sheet also includes a bottom edge having anchors for holding the bottom edge below the surface of the water. The sheets may include structure for connecting adjacent sheets in top-to-bottom relationship and/or in side-to-side relationship.

Abstract: A system for containing and collecting oil spills and other water surface contaminants is provided. More specifically, the invention comprises a plurality of oil containment boom sections adapted to be coupled together, each section including a body fabric made of assorted polyester and nylon substrates and having spaced heat sealed areas therein, a flotation log of sealed spiral-wound air-bubble material, a ballast preferably made of sand sealed inside a polyester tubing, an upper hand-hold strength member preferably made of closed-cell polyethylene foam sealed at the top of the oil boom and containing a tension strap having a selected tensile strength, a hand-hold loop sewn to the body fabric to aid in handling an retrieval, and a vertical stiffener made of plastic or aluminum sealed in the boom to aid during top flotation and freeboarding conditions.

Abstract: A containment boom (10) includes a plurality of self-inflatable units (12) each having a plurality of chambers (26) connected end to end. Each chamber (26) has an air valve (28) at each end thereof. A water repellent and airtight covering (32) is provided for each chamber (26). A flotation subassembly (44) is positioned within an open space formed within the covering (32). The flotation subassembly includes a pair of open cell buoyant flotation members (54, 56) disposed on adjacent sides of an intermediate water repellent flotation member (58). The intermediate water repellent flotation member (58) is preferably formed of a closed cell polyethylene material and provides increased buoyancy to open cell flotation members (54, 56), particularly in the event that a rupture of the covering were to occur such that the open cell flotation members (54, 56) absorb water.

Abstract: An end connector for use with oil containment booms, wherein the connector design utilizes a stress distribution technique which avoids the need for proximal end flanges, internal cavity traction surfaces, and further avoids bolts, rivets, or other fasteners through the boom fin end. The end connector design has a smaller size than conventional end connector designs with comparable tensile strength capabilities. Further, the end connector may be fabricated faster than conventional end connectors, reduces connector cost, and reduces final boom assembly time.

Abstract: An arrangement for containing oil spillage comprises an inflatable boom and suspended in the water therefrom an anti-pollution skirt and/or a deformable tube, cables and a generally horizontal membrane to restrict movement of the boom. The boom may be deployed in an uninflated condition and then inflated from an adjacent buoy. The deformable tube is arranged to pump fluid in response to forces on the cables caused by motion of the water.

Abstract: A reinforced net apparatus, defined by a recovery net portion and a rear bag portion, the recovery net portion including a lower body panel portion of reinforced heavy duty netting, interconnected to left and right side panels of netting, and a top body panel portion of lightweight netting, together forming a forward debris-receiving opening. The recovery net portion would be interconnected at its rear wall to a bag portion, comprising netting, for receiving the debris collected in the recovery portion, the bag portion closed off at its rearmost end, and including elephant ears for recovering the bag portion when it is filled with debris. There is further included a lead chain member across the forward floor portion of the net and a trash chain to contact the debris and help move it into the net while the net is being pulled along the bottom of the body of water by a vessel.

Abstract: A boomstick is formed from an elongated hollow cylindrical body divided into plurality of compartments by axially spaced traversed partitions and enclosed at its end by sealing end caps. Preferably, an axially extending keel forming ballast will be provided to orient the boomstick and axially extending stabilizers will be symmetrically spaced on opposite sides of the body portions spaced from the ballast. The whole boomstick is coated with a polyethylene coating sufficiently thick to protect cylindrical body and to receive the caulks of workmen without damaging the body portion while providing a good retention between the caulks and the coating to better ensure the comfort and safety of the workmen.

Abstract: A containment boom having the shape of an elongated floatable flexible wall member which is capable of being wound on a spool and deployed therefrom as described. The floatable flexible wall member has a vented flotation tubular membrane. A flexible sheet-like skirt member is secured along the tubular membrane along a longitudinal axis thereof. A ballast is secured to a lower elongated edge of the skirt member. The flotation tubular membrane is provided with a plurality of collapsible individual spiral coils disposed internally of the tubular membrane. The membrane support coils are secured to a plurality of bases which are interconnected to one another by a flexible connecting joint or the tubular membrane. A pull cable is secured along a top part of the tubular membrane.

Abstract: Flotation spars are detachably connected along the length of an oil containment curtain to insure the verticality of a floating containment boom. Spaced tubular sleeves extend vertically along one side of each band. The sleeves are so configured as to pivotally or hingedly mount the flotation spar to the curtain in such a manner as to permit a free pivotal action of the sleeve and spar with respect to the face of the curtain. The flotation spar is also secured to the sleeve by a pair of locking tabs that extend upwardly from the top edge of the sleeve. A cap slides over the top end of the spar and fixes the locking tabs between the cap and spar wall.

Abstract: A boom includes a plurality of boom sections joined end to end. Each boom section includes two or more parallel inflatable chambers which are joined with a weighted curtain which is reinforced for strength. Boom sections are stored compactly on respective reels. A substantial number of reels are arranged compactly in the hold of a carrier vessel which is smaller in size and has greater speed and maneuverability than vessels carrying known oil spill containment systems. Boom sections are consecutively unwound from their respective reels and connected end-to-end as they are deployed to form a continuous boom. The boom sections unwind naturally from the reels as the carrier vessel moves through the water away from a tender vessel holding the first end of the boom. The boom's deployment is controlled by a brake on an idler roller and a hydraulic crane's drive wheel on the reel, thus limiting manual handling to lighter-weight tasks.

Abstract: Floating oil are containment boom sections are provided with one or a plurality of collapsible and inflatable bladders or buoyancy chambers, extending along the upper edge of the boom section's skirt, and enclosed inside an elongated gas-impervious sleeve which is also collapsible and independently inflatable through its own inflation/deflation valve, producing dual chamber inflated buoyant flotation forming the upper edge of the boom. ASTM scarf-joint connectors join adjacent boom sections, which are ballasted along their lower skirt edges and provided with tension-carrying reinforcing cable, chain or webbing.

Abstract: A net for removing debris is mounted on a frame which is extendable across the width of a swimming pool. The frame has a rounded or ball-type element at each lower end which rotates about an axis to facilitate travel and to protect the swimming pool surfaces from damage as the swimming pool cleaning device is moved through the water during a cleaning operation. Handles are provided for pulling the net through the water by persons on opposing sides of the pool. The pool may be cleaned in a single pass across the length of the pool. The net may be completely or partially rolled up about at least one of the side members of the frame.

Abstract: A cylindrical ceramic foam body that can be the sole buoyant member of an oil-containment boom is produced by firing a mixture of fine particles of ceramic precursor, a source of carbon such as silicon carbide, and a metallic oxide. In the boom, a stack of the ceramic foam bodies, each of which is a cylinder, can be held together by wire mesh to provide a buoyant log. A plurality of the buoyant logs can be inserted end-to-end into a 3-layer loop, viz., an inner layer of a ceramic textile fabric, a middle layer of knitted wire mesh, and an outer layer of polymer-coated fabric.

Abstract: An apparatus for containing and cleaning up an oil spill at an offshore oil platform in a body of water includes a hollow circular ring surrounding the oil rig and supporting a depending frustoconical skirt wall anchored to the ground by biasing springs which permits the vertical movement of the ring and skirt wall with variations in the water level. A second hollow ring is connected to the first ring by a peripheral skirt wall which confines oil floating on the water surface. A tanker along the side of the rings sucks up the ring-confined oil by suction pumps and stores and removes the oil. In an alternative form, the first skirt wall is formed of an elastomeric web and stays extending obliquely along the wall face between ground and the first ring biases the wall and ring downwardly.

Abstract: A device for confining oil floating upon the surface of a large body of water employs a horizontally deployable continuous pliable oil-resistant wall having parallel upper and lower edges. A multitude of uniformly spaced vertical support members are attached to the wall. A non-extendable cable engages the vertical support members in parallel relationship to the edges of the wall. Floatation devices are attached to the vertical support members adjacent the upper edge of the wall, and weight devices are attached to the vertical support members adjacent the lower edge of the wall. The effect of the flotation and weight devices is to cause the wall to ride vertically in the water with its upper edge extending above the oil level.

Abstract: An oil boom for containing floating oil spills having an hose with a plurality of tubing members mounted to the periphery of the hose. Each tubing member has a nozzle assembly for directing an air jet stream against an oil spill along the top surface of the water. The oil boom is preferably connected to a tow line by a pair of connecting lines which are in a criss-cross pattern, allowing the hose to form a wave-like configuration so that the air hose may rise and fall with the movement of the surface of the water independent of the tow line.

Abstract: A combined skirted oil-sorbing boom and oil-sorbing sweep has a buoyant inner core and an oil-sorbent outer core of a spirally wound sheet of polymeric, oleophilic, hydrophobic microfibers. Adhesively bonded to a sheet of the microfibers at the outer face of the outer core is an open-mesh netting of polymeric monofilaments that are fused at their crossings. The netting and the sheet to which it is adhered extend from the outer core to form a depending skirt which acts as a barrier to oil that is being sorbed by the microfibers. The buoyant inner core can be an open-cell foam that sorbs oil slowly, thus supplementing the oil-sorbing capability without significant loss of freeboard.

Abstract: A contamination containment boom section of the type adapted to contain a contaminant in a preselected location on a body of liquid, the boom having an elongated flotation body adapted to float on the body of liquid and a weighted skirt member depending from the flotation body and extending downwardly a preselected distance into the body of liquid. The flotation body has a large water plane area compared to its top and is preferably, but not necessarily substantially triangular in cross section with rounded apices. The flotation body comprises a plurality of ribs each having the general shape of the cross section of the flotation body. The ribs, together with an optional plastic liner, a plurality of elongated mounting strips, and fasteners for fastening the ribs to the mounting strips and for optionally fastening the mounting strips to the plastic liner at intervals therealong, make up a skeleton framework for the flotation body.

Abstract: An oil spill containment boom deployable normally by one person between a pier and vessel especially useful for oil transfer operations from ship to shore that will remain in position on the water regardless of changes in the ship draft comprising a floating flexible barrier having an elongated unitary tensioning member disposed from end to end and held in place by strategically positioned sleeves connected over areas of the float to hold the barrier in place.

Abstract: The present invention discloses a detachable boom for containing and recovering fluids spilled on open water. The invention has a float system using a plurality of floats arrayed along a flexible, stretch-resistant cork line, a substantially rectangular barrier where the barrier is fixedly but detachably attached to the float system by a first attachment system, and an elongated weight device which is fixedly but detachably attached to the bottom of the barrier. The detachable boom disclosed in the present invention can be anchored in a stationary position or towed behind a small-to-medium sized marine vessel using a towing bridle.

Abstract: A floating containment boom for containment and isolation of waterborne pollutants, such as oil, silt, medical waste, bacteria, debris, and suspended particulates. The containment boom is comprised of a floatation unit, a ballast, a continuous curtain of at least one sheet of a flexible geosynthetic fabric, and at least two tow cords. The curtain has an upper sleeve containing the flotation unit and may have a lower sleeve containing the ballast. The geosynthetic fabric is water-pervious and may be oil-absorbing. The fabric allows water to pass through while containing the waterborne pollutants. The boom of the invention may also be used as a seining device, to define a swim area, and as a littoral flow trap.

Abstract: A fence for enclosing impurities floating on water including a series of bands of two-ply material with the two plies fused together in selected areas including the entire upper edge and with weighted floating pickets inserted vertically between the two plies up to the fused upper edge with both plies extending beyond each band at both ends of the band, one ply at both ends being wrapped about end pickets which are pressed together to form a juncture between bands and with the other plies extending beyond the bands being folded over one another and sealed together to prevent leakage at the juncture.

Abstract: A horizontally elongate floating boom for confining contaminate material floating on the surface of a body of water. There is a flotation section having a substantially vertical contaminate impervious skirt section extending downwardly therefrom. The skirt section has first and second ends which are adapted to overlap one another. A substantially vertical net section extends downwardly from the skirt section, and has a ballast section attached along a lower edge thereof. Apparatus is provided for securing a first end of a skirt section and a second end of a skirt section together when they are overlapped. In a first embodiment, the ballast section is adapted to rest on the floor of the body of water so as to maintain the boom in a fixed position. In a second embodiment, apparatus is provided for contracting the boom about a portion of the body of water which is encircled by the boom.

Abstract: A system for containing spillage from a tanker at a moorage. The system in its deflated stated state remains submerged so as not to obstruct the passage of a vessel thereover. Once a vessel is moored in place thereover, the perimeter boom is inflated to bring the boom to the surface to surround the entire ship. A liner continguously attached to the boom extends downwardly to form impermeable walls and a floor below the tanker. The system is routinely deployed prior to any on-loading or off-loading operation when spills are most likely to occur. Deflation of the boom upon completion of the operation causes the entire system to once again assume its submerged state.

Abstract: Floating barriers are provided with containment means (doublecoated with polyvinyl chloride) of woven twisted nylon thread and with low density polyurethane floating means. The two previous characteristics, along with a change in arrangement, size and shape of other means in current barriers, have surprisingly improved properties, such as wear resistance and use versatility, even under extreme conditions.

Abstract: Floating containment booms for containing petroleum and similar product spills on a water surface such as at sea, in harbors, rivers and the like, and methods for forming the same. In accordance with the method, an elongate sheet of flexible material and components for mixing to form a plastic foam or a foam forming or expanding material together with apparatus for forming the containment boom therefrom are stored for use when required. In operation on a boat, the apparatus forms a loop or opens a preformed loop or loops in the material, at the same time injecting the foam forming material in the loop so formed to expand and fill the same with foam at the same is played out from the boat while traversing the region to be surrounded by the oil boom. The portion of the elongate sheet opposite the loop is preferably weighted, either prior to use or as the oil boom is formed and played out from the boat.

Abstract: The present invention relates to a continuous containment barrier comprising a plurality of compartmentalized inflatable chambers having, attached to the bottom thereof, an impermeable keel which stabilizes the containment barrier and assists in containment of the spilled petroleum product even under turbulent conditions. Extending below the keel is an elongate skirt which has a plurality of apertures therein that provide the necessary water pressure relief while still maintaining the necessary strength for successful containment of a spilled petroleum product. The barrier is designed to develop a desired height of petroleum product floating on an aqueous environment so that efficient recovery can occur.

Abstract: A boom stick for use with log booms in water transport and storage of logs is formed by a plurality of vehicle tires (used) arranged in substantially axially aligned, side by side relationship with their tread surfaces forming the outer periphery of the boom stick. Axially extending reinforcing rods pass through the rim receiving holes in the tires and hold the tires together and a material (preferably foam concrete) having a higher specific gravity of less than 1 substantially fills the tires. In a preferred arrangement the tires are filled to a preselected level with light weight material and the remainder filled with a material having a higher specific gravity than the light weight material to provide a longitudinally extending heavy segment that orients the boom stick in the water.

Abstract: An oil catching boom which comprises, on the one hand, an upper part in the form of a floating, flexible hose and, on the other hand, a skirt (3) attached under it and extending into the water. With the purpose of providing a boom the flexibility of which is easy to adjust according to intended use, the upper part is made up, on the one hand, of an outer hose (1) of a fabric-like material, open at its ends, and, on the other hand, of an inflatable inner hose (8) placed inside it. The flexibility of the inner hose or its division into segments is achieved by means of hose strictures which are produced, for example, by means of band-like throttling rings (11) fitted at predetermined intervals around the hose. A longer unit assembled from boom parts can be equipped with an inflation hose extending over its hole length.

Abstract: A high temperature resistant flotation core and a high temperature resistant oil containment boom which allows for the in-situ burning of spilled or leaked oil during offshore oil spill cleanup operations are disclosed. The boom can also be used for precautionary fire containment during non-burn oil spill cleanups and can be easily recovered and redeployed.

Abstract: A redeployable, high temperature oil containment boom which allows for the in-situ burning of spilled or leaked oil during offshore oil spill cleanup operations is disclosed. The boom can be used for precautionary fire containment during non-burn oil spill cleanups and can be easily recovered and redeployed.

Abstract: A high temperature oil containment boom which allows for the in-situ burning of spilled or leaked oil during offshore oil spill cleanup operations is disclosed. The boom can be used for precautionary fire containment during non-burn oil spill cleanups and can be easily recovered and redeployed.

Abstract: An improved contamination control boom having walls defining an elongated hollow flotation chamber. Apertures may be provided in the walls of the flotation chamber to allow material from the body of liquid on which the boom is utilized, which may be the liquid, the contaminant, or a mixture thereof. Pump means may be incorporated to remove the material from the flotation chamber. A float means is positioned inside the flotation chamber to provide a desired freeboard for the condition of liquid in the flotation chamber. Special materials may be utilized to fabricate the boom for high temperature resistant applications where the contaminent is burning, but the boom must continue to operate as a boom during the burning.

Abstract: A collapsible boom for use in confining oil spills on water formed of an elongated curtain of flexible material having along the upper edge a tubular portion and along the lower edge a flexible ballast, such as a chain, the curtain containing a plurality of spaced-apart short length cylindrical floats in the upper tubular edge, each float having a passageway therethrough permitting the flow of air through the float and to all parts of the interior of the upper tubular edge, and at least one closure cap permitting, as the curtain is expanded, air to flow into the upper tubular edge so that the boom when placed on water will float and, when removed from water and collapsed into a stored position will permit air to escape, the opening being closeable while the boom is in use on water.

Abstract: A fireproof boom for containing flammable pollutants on water includes a flotation member, a heat-resistant water-sorbent material surrounding the flotation member and a protective fence surrounding the water-sorbent material. The flotation member is a series of cylindrical metal cans held end-to-end. The heat-resistant water-sorbent material draws water around the heat-sensitive flotation member, forming steam in the presence of flaming pollutant and allowing only the outer layer of heat-resistant material to become slightly singed. The protective fence surrounding the water-sorbent material is heavy steel wire woven in continuous spirals so that when the spirals are integrated with each other a diamond-shaped mesh is formed.

Abstract: A reinforced net apparatus, defined by a recovery net portion and a rear bag portion, the recovery net portion including a lower body panel portion of reinforced heavy duty netting, interconnected to left and right side panels of netting, and a top body panel portion of lightweight netting, together forming a forward debris-receiving opening. The recovery net portion would be interconnected at its rear wall to a bag portion, comprising netting, for receiving the debris collected in the recovery portion, the bag portion closed off at its rearmost end, and including elephant ears for recovering the bag portion when it is filled with debris. There is further included a lead chain member across the forward floor portion of the net and a trash chain to contact the debris and help move it into the net while the net is being pulled along the bottom of the body of water by a vessel.