Abstract: A net assembly used for purse seine fishery, which is mounted on a first vessel, dropped into seawater from the first vessel, and towed by a second vessel to surround and pull fish to capture fish. The net assembly includes a plurality of floats floating on a surface of seawater to provide buoyancy to the net assembly, and coupled to one another in a spaced manner in a lengthwise direction of the net assembly; a net combination of a plurality of nets disposed under the floats in an inter-coupled state, and sunken and deployed from the surface of seawater to surround and capture fish; a weight body extending along a lower end of the net combination to provide a sinking force by means of gravity to sink the net combination; and a purse wire extending along the net combination while being spaced apart from the weight body in a downward direction, and tightened by the first vessel to allow the net assembly to form a closed space below the surface of seawater.

Abstract: A device mounted to a vessel for harvesting a subsurface concentration of artemia cysts. In certain embodiments, the device includes a vertically adjustable front net support, a vertically adjustable rear net support and a net having a first end secured to the front net support and a second end secured to the rear net support. A conduit can be coupled to the second end of the net whereby the concentrated artemia cysts are drawn from the second end of net to a processing destination. In certain embodiments, the net has an aspect ratio of at least approximately 4:1. The processing destination could be the vessel or some other destination. In certain embodiments, the vessels are equipped with a dewatering station to which the concentrated cysts are directed for further processing. In some embodiments, the net is secured to a frame which is in turn coupled to the front net support. The front net support can include one or more arms.

Abstract: The present disclosure provides a trawler with a fishing and conveying device and a fishing method, and belongs to the technical field of trawlers. The trawler of the present disclosure includes a hull structure and two fishing devices, wherein the fishing device includes a first rotary rod, a second rotary rod, a fixing frame and a fish suction mechanism, the first rotary rod is hinged at the bow of the hull structure, a fishing net is connected on the first rotary rod, the second rotary rod is hinged at the stern of the hull structure. The present disclosure is capable of realizing continuous fishing and directly conveying the fish onto the trawler, and thus is simple to operate.

Abstract: A watercraft boarding apparatus is herein presented, the watercraft boarding apparatus including a frame adapted to be secured to an object, a pivotable platform pivotably secured to the frame about a pivot axis thereof, the pivotable platform being configured to pivot between an extended configuration for securing a watercraft on water and a boarded configuration supporting the watercraft thereon and a pair of connecting members secured to the pivotable platform to secure the watercraft, wherein pivotal of the platform is adapted to progressively board the watercraft on the platform by sharing a weight of the watercraft between the pivot and water. A method of use and a kit thereof are also contemplated and remain within the scope of the present specification.

Abstract: A portable winch and method of use is shown. One advantage of winches shown includes an ability to lower a boom or boom sections into limited access exit pit for winching operations such as pipe bursting. Sectional boom designs shown provide the ability to easily raise and lower a boom large distances without the need for a single long boom. Selected winch designs shown include flexible inserts between the boom and the winch frame that help resist damage from unforeseen shifting of the device during operation. Designs and methods shown also include multiple pulleys on a boom end unit. Fasteners are shown that reduce build up of debris.

Abstract: A fishing device which includes a tow boat, a noise generator, a Catamaran boat plate, a collection net assembly, a Catamaran, two rigid tow bars and a plurality of bent tubes. The collection net assembly includes an inlet net frame, a collection net, a rectangular outlet door and two blocking nets. The problems in conventional fishing methods: low fish catch and large manpower requirement which is not suitable for large scale fishing in fishing with fishhooks and small fishing nets, as well as failure to provide classification fishing for silver carp which in turn resulted in low fishing efficiency, low work efficiency and wasting of manpower in seine fishing, can be resolved effectively.

Abstract: The invention concern a lifting arrangement, intended for the launch, retrieval and storage of small floating units on a boat, by carrying out at the same time a pivoting and a translational motion in a forwards or in a backwards direction. For easy and safe handling a floating unit at a leisure boat, it comprises a frame (6) intended to be fixed attached to the boat, a link arm system (5) including a lever (10), which through a joint (17) allows pivoting and through the influence of a control and actuator means (13), carry out a tipping action forwards and backwards, an angled lifting arm (12) with a first (12?) and a second (12?) shank, whereby the lifting arm (12) is guided during the tipping motion through interaction between a guide (20) that protrudes from the frame and a guide surface formed as a cam curve (21) formed from a downwardly facing surface of the lifting arm.

Abstract: A selectively bendable remote access gripping tool, includes a jaw portion having a pair of jaws or nets movable relative to each other between clamped and opened positions thereof, a handle portion spaced apart from the jaw portion by a bendable central portion that has a hollow, corrugated member that is bendable, and a cord extending through the hollow bendable member that connects the jaw portion and the handle portion.

Abstract: A selectively bendable remote access gripping tool, includes a jaw portion having a pair of jaws or nets movable relative to each other between clamped and opened positions thereof, a handle portion spaced apart from the jaw portion by a bendable central portion that has a hollow, corrugated member that is bendable, and a cord extending through the hollow bendable member that connects the jaw portion and the handle portion.

Abstract: A hand-held remote access device, such as a netting tool, includes a jaw portion having a pair of nets movable relative to each other between fully clamped and fully opened positions thereof, a handle portion spaced apart from the jaw portion by a bendable central portion that has a hollow, corrugated member having alternating ridges and grooves that is bendable so as to attain a predetermined shape.

Abstract: Watercraft automation and aquatic data are utilized for aquatic efforts. In one aspect, an anchor point is obtained and a watercraft position maintenance routine is actuated to control the watercraft to maintain association with the anchor point. In another aspect, prior aquatic effort data is obtained in association with an anchor point. In yet another aspect, current aquatic effort data is generated in association with an anchor point. In still another aspect, current aquatic effort data and prior aquatic effort data are utilized for prediction generation. In yet another aspect, current aquatic effort data and prior aquatic effort data are utilized to obtain another anchor point for a watercraft.

Abstract: A net holster holds fishing nets outside a boat and out of the way of anglers inside the boat. The net holster of the present invention has over 100 adjustable positions to keep the net out of the way. The net holster can keep a net in place outside the boat of speeds of at least 30 miles per hour. The net holster of the present invention is designed to hold most nets. A universal clamp and a tie down clamp enable the net holster to fasten to a variety of marine vessels with very little effort.

Abstract: A snap ring for coupling a purse line to a purse seine includes a frame, a plurality of rollers, a frame opening, and a locking unit. The frame is connected to the purse seine. The purse line passes through a second end of the frame. The rollers are rotatably provided in the frame at positions at which the purse line is brought into contact with the frame. The frame opening is formed in one side part of opposite side parts of the frame to open the frame. The locking unit is coupled to the frame to openably close the frame opening. The locking unit includes a first cylinder which is hinged at a first end thereof to the part of the frame which corresponds to a first end of the frame opening.

Abstract: A device that assists in the holding and releasing of a cast net when thrown for fishing is herein disclosed. The device replaces the traditional practice of holding the edge of a casting net in a fisherman's mouth while throwing. The device is made of a section of synthetic cord wherein each end of the cord is attached to the outward leg of a clip mechanism, thus forming a loop configuration. The loop is then placed around the fisherman's neck with the clip mechanism hanging in a downward configuration. The cast net is then prepared to throw but instead of placing the edge of the net in the mouth, it is secured within the jaws of the clip. The net is then cast and as the net travels away from the fisherman, it pulls away from the clip resulting in a perfect cast.

Abstract: A casting net is provided that allows for easy use. The casting net includes a tail portion and a mouth portion that are connected by a mesh lattice netting. The tail portion is of a smaller diameter than the mouth portion, and the tail portion is substantially closed allowing only a torque line assembly to pass through. The mouth portion is of a substantially larger diameter than the tail portion, so as to provide a larger area for capturing targeted species. A plurality of weights are affixed along the circumference of the mouth portion for providing weight so as to sink the casting net assembly. Along the circumference of the mesh lattice, and in close proximity to the mouth portion, a reinforcing means is affixed so as to provide structural support to the mouth portion and thereby maintaining an open position of the mouth portion as the casting net falls through the water.

Abstract: A trawl net layer-by-layer collecting device includes a rectangular cylindrical frame configured to draw a plurality of trawl nets that are arranged in an up and down direction. The frame includes an upper edge to which a net mouth edge of an upper net of the uppermost trawl net is anchored, and a lower edge to which a net mouth of a lower net of the lowermost trawl net is anchored. A pair of vertical bars are disposed on opposed sides of the frame. A slider having opposed ends slidably engaged with the vertical bars, the slider anchoring thereto the net mouth edge of the lower net of the upper trawl net and the net mouth edge of the upper net of the lower trawl net. A net-mouth opening and closing unit is configured to lock the sliders on upper ends of the vertical bars, and unlock the locked sliders one by one; and a controller.

Abstract: One embodiment of a castable fish catching net device operable by one person for capturing aquatic animals from any body of water without the need for the operator to enter the water. Includes a purse type seine supported by a generally triangular frame which is heavier than the surrounding water thus providing a sinking force. A handle is attached to the apex of the triangular frame extending in towards the center of the frame. A casting and retrieval cord is attachable to the most center end of the handle. Buoyant means is provided to orient the fish catching net device in a substantially vertical attitude relative to the surface of the body of water as it descends into the water. The purse shaped net has membranes that generate a buoyant-force as the fish catching net device is dragged through the water thus providing the operator with the ability to control the depth of deployment by varying the speed of forward travel through the water.

Abstract: A fishing net is described incorporating an electronic weighing device to weigh a fish whilst the fish is still in the net. The fishing net comprises a handle connected to a frame and a water permeable bag coupled to the frame. An electronic weight measuring device measures the weight of a fish or any other marine creature in the water permeable bag. The weighing action requires the user to lift the fishing net out of the water keeping the fishing net in a substantially horizontal position and read the weight from the display.

Abstract: A purse ring for interconnecting a purse seine to a purse line is disclosed. Structurally, the purse ring includes a frame defining an aperture, with two rollers mounted across the aperture. As constructed, the rollers and the first and second sides of the frame between the rollers define a periphery around a passageway for receiving the purse line. Importantly, the portion of the first side of the frame adjacent the distal roller includes a hard facing in order to reduce wear. Also, the purse ring includes a cable release arm pivotally mounted as a portion of the second side of the frame, a sleeve for engaging the free end of the cable release arm to the frame, and a lock for holding the sleeve in place.

Abstract: A scooping implement capable of easily scooping small fish, such as, e.g., aquarium fish, kept in a display aquarium without causing any damage to the fish body is provided. A synthetic resin transparent bag 5 is detachably attached to an annular frame main body 2 having a handle 4 by holding down an opening portion of the bag 5 with an annular pressing frame 3 attached to the main body in an openable and closable manner.

Abstract: Described is a multi-roller snap ring with one or more rollers extending across a space defined by a frame and one or more rollers integrated within the frame of the snap ring. The multiple rollers reduce and mitigate the frictional wear and tear caused by a purse line being drawn through the snap ring during purse seine deployment and retrieval operations. In addition, a locking mechanism with a spring-loaded, sliding and rotating lock forming a portion of the frame and a stopper tab are disclosed.

Abstract: A fish catching system for includes a fishing pole and a fishing net to receive a fish landed by a user of the fishing pole. A support assembly engages and extends between the fishing net and the fishing pole. The support assembly supports the fishing pole above the fishing net to support the fishing pole when the fishing net and fishing pole are being held by the user.

Abstract: An under ice crawler lowerable into a body of water through a hole in a layer of ice overtop is operable to extend a flexible line within the body of water between two points spaced along the ice. The crawler features a floating body having sliding surfaces defined at an upper limit thereof, a motor carried on the floating body to selectively drive a propeller, a connector carried on the floating body to facilitate the connection of the line thereto and a starting device carried on the floating body and actuable from thereabove. A termination device is carried on the floating body at a position distinct from that of the starting device to provide easy access. The starter device is actuable by lowering a starting-signal generator through the hole in the ice into proximity with a starting-signal sensor carried on the float body without requiring physical contact with the receiver.

Abstract: The present invention relates to a sampling device for capturing samples from a fluid environment. The invention has particular application to the capture of phytoplankton samples from bodies of water. The invention is adapted to allow a sampling net to be easily manipulated by a user. Means of minimising and/or eliminating potential contamination of any collected samples are also provided.

Abstract: A motor-driven mechanical netting device includes a net assembly, a slide assembly, a bracket, and a mount. The slide assembly is structured to support the net assembly and includes a guide bar. The bracket is structured to support the net assembly, the slide assembly, and a motor. The mount is structured to support the bracket.

Abstract: Herein known as REELBACK this device has been designed to retrieve lost items such due to separation from user, vessel, pier or persons such as fishing gear or other non-aquatic device. This device is of suitable materials containing herein a preloaded retrieval device, housed with a deployable flotation device, allowing recovery of fishing gear or non aquatic items such as binoculars, keys, rods with reels, dip-nets, etc. items lost at sea, lakes, ponds and other bodies of water.

Abstract: A trawling vessel is provided with a trawl net (5) for catching marine bio-resources, with a trawl sack (3) attached aft on a trawl net (5) for keeping the catch. The vessel comprises lines (51, 61) for towing and hauling the trawl net (5), and trawl drums (6) for hauling the trawl net (5). A lock chamber (1) is provided in a stern (21) of the vessel and has a main portion of its volume arranged below the design water line of the vessel. The lock chamber (1) is arranged for hauling the trawl sack (3) with the catch from the sea through a sluiceway (2) in the stern (21), for discharging the trawl sack (3), and for temporarily keeping the catch. A trunk channel (16, 12) leading up from the lock chamber (1) enables the trawl sack (3), in a generally discharged state, to be hauled up through the trunk channel (16, 12) to a deck (24), thereby leaving the catch in the lock chamber (1).

Abstract: The present invention relates to a foot operated fishing net tipping apparatus releasably attached to a fishing boat comprising: a boat-attaching portion, a net-holding portion, a lock portion, a foot pedal portion and connecting members. A conventional fishing net is therefore frictionally attached within an opening of the net-attaching portion, which rotably pivots atop the boat-attaching portion. A foot pedal is linked to the net-attaching portion as such to allow the pedal's motion to be transferred to the net-attaching portion. A fisherman can raise and lower the fishing net with one foot, thereby freeing both hands for the fishing rod.

Abstract: The present invention relates to net hauling equipment for fishing vessels, which allows easy hauling of the fishing net laid onto the sea. The net hauling equipment according to the present invention, which is installed onto a fishing vessel, comprises a rotary apparatus, installed at the bow of the fishing vessel, which is capable of rotation in the horizontal direction; a driver axle which rotates by way of a motor installed onto a frame on one end of said rotary apparatus; rollers, extended along the axis of said driver axle, which are partitioned by middle plates fixed onto said form; auxiliary rollers installed at a slant onto the lower end of the respective middle plates between said rollers; and side plates, one side of which is respectively fixed onto said frame, and which are installed onto the respective side of the nearest and the farthest rollers from the perspective of the driver axle.

Abstract: A cast net throwing device is provided for use with a cast net including a netting defining a mesh, with the netting being bounded at an outer periphery by a lead line, and the cast net that may including a plurality of brail lines secured at opposite end to the lead line and interconnected there between to a throw line, with the throw line and brail lines operating in combination with one another to close the net when a user pulls on the throw line. The cast net throwing device comprises at least one handle member having apertures for accepting brail lines, (throwing device) operatively secured to the central area of the netting intermediate the lead line, without interfering with the function of the brail lines of the cast net. The handle member is sized and configured to permit a user to grasp the member, thereby enhancing the user's ability to impart rotation to the cast net when the cast net is thrown.

Abstract: In a preferred embodiment, fishing netting, including: a plurality of meshes formed from straps of twine, each strap having loops formed at each end thereof and at the center thereof, each loop being secured by a mechanical fastener. A method of manufacturing the fishing netting is also provided.

Abstract: A device for throwing a cast net that facilitates the throwing and improved deployment of said cast net. The device is predominatly disc shaped and contains a multiplicity of radial openings that span an area from near the periphery of said disc to a central portion of the disk. The device is attached to a typical cast net by passing the individual draw strings from the central hub of the net, down through the separate radial openings in the disc shaped device, to the weighted peripheral line of the cast net. The device provides the means for imparting a uniform centrifugal motion to the weighted cord of a typical cast net, then allows the draw strings to freely slide through the device while the net expands. After net deployment, the device then allows the draw strings to move from a point near the circumference of the device to a central portion of the hub of the device upon retrieval.

Abstract: A cast net throwing device is provided for use with a cast net including a netting defining a mesh, with the netting being bounded at an outer periphery by a lead line, and the cast net that may including a thimble, a plurality of brail lines secured at opposite end to the lead line and interconnected there between to a throw line, with the throw line and brail lines operating in combination with one another to close the net when a user pulls on the throw line. The cast net throwing device comprises at least one handle member, (throwing device) operatively secured to the central area of the netting intermediate the lead line, without interfering with the function of the brail lines of the cast net. The handle member is sized and configured to permit a user to grasp the member, thereby enhancing the user's ability to impart rotation to the cast net when the cast net is thrown.

Abstract: A device for throwing a cast net that facilitates the throwing and improved deployment of said cast net. The device is predominatly disc shaped and contains a multiplicity of radial openings that span an area from near the periphery of said disc to a central portion of the disk. The device is attached to a typical cast net by passing the individual draw strings from the central hub of the net, down through the separate radial openings in the disc shaped device, to the weighted peripheral line of the cast net. The device provides the means for imparting a uniform centrifugal motion to the weighted cord of a typical cast net, then allows the draw strings to freely slide through the device while the net expands. After net deployment, the device then allows the draw strings to move from a point near the circumference of the device to a central portion of the hub of the device upon retrieval.

Abstract: A cast net throwing device is provided for use with a cast net including a netting defining a mesh, with the netting being bounded at an outer periphery by a lead line, and the cast net further including a plurality of braille lines secured at opposite ends to the lead line and interconnected therebetween to a throwline, with the throwline and braille lines operating in combination with one another to close the net when a user pulls on the throwline. The cast net throwing device comprises at least one handle member, with the at least one handle member being operatively securable to the netting without interfering with the operation of the braille lines of the cast net.

Abstract: An autonomous marine vehicle is disclosed, the vehicle comprising a rigid hull having an interior and a periphery, a deck joining the rigid hull at the periphery; and a rigid mast pivotally attached to the deck, the mast housing a plurality of sensors capable of effecting communication to and from said vehicle. In preferred embodiments, the vehicle further comprises various sensors and mission-specific hardware. Sensors include mast-mounted audio/video devices, radar, GPS and RF antennas, and other positioning and collision avoidance devices. Mission-specific hardware include refueling probes, fire protection systems, towing assemblies, flame thrower assemblies, liquid spray assemblies, and work pup assemblies.

Abstract: An automatically closing drop fishing net is provided for commercial fishing operations. The drop net assembly includes an upper float ring, a lower weight ring, and a net formed in a generally tubular configuration. The upper end of the net is attached to the float ring and the lower end of the net is attached to the weight ring. The drop net assembly has several torque lines that extend from locations on the float ring on the outside of the net to locations on the weight ring that are initially angularly offset at least one hundred eighty degrees relative to their points of attachment to the float ring. The torque lines are shorter than the vertical length that the net would assume in a stretched condition with the float ring buoyed upon the surface of a body of sea water and with the weight ring suspended therebeneath and held only by the structure of the net. As gravity pulls the weight ring downwardly from the float ring in the water, tension is exerted on the torque lines.

Abstract: An improvement in cast nets includes a first ring to which a throw rope is releasably attached and a second ring that is interconnected to the first ring by a housing that allows the rings to swivel independently with respect to one another. The second ring is releasably attached to a semicircular handle that is attached to an apertured flat disc. Each brail has an uppermost end that extends through an aperture in the disc and which is knotted so that it cannot fall back through the aperture. An annular ring is releasably attached to the flat disc and overlies the knots to prevent axial travel of the brails. The rotational connection between the rings facilitates throwing the net, and the connection of the top end of the brails to the apertured disc inhibits tangling of the brails with one another and facilitates replacement of broken brails.

Abstract: Apparatus for handing monofilament fishing line including a plurality of branch lines with associated hooks is disclosed including an elongated substantially cylindrical body mounted on the bow of the vessel so that a plurality of loops of the monofilament fishing line can be formed thereon, a substantially U-shaped yoke mounted on the stern of the vessel whereby the plurality of loops of the monofilament fishing line can be drawn therefrom, and including braking means associated with the U-shaped yoke for applying pressure to the plurality of loops and ensuring that they are drawn individually from the substantially U-shaped yoke.

Abstract: An outrigger device is provided for automatically controlling outriggers on a fishing boat. The device comprises three strut members connected to a side surface on a fishing boat at given points. Two of the strut members will be of variable length, while the third strut member is of a fixed length. The first variable strut member serves as a base for the main outrigger pole. The second variable strut member and the fixed strut member serve as supporting and controlling struts for the outrigger pole. Variable strut members will be varied, either independently or together, to change the position of the outrigger device to correspond to several different situations.

Abstract: An apparatus for harvesting floating brine shrimp colonies from open water is disclosed. The apparatus includes a boat fitted with a driven roller arrangement adapted to engage and retrieve a floating boom positioned to enclose the subject shrimp colony. A conveyor belt fitted with a plurality of net-fitted frames is also mounted on the boat and is positioned to receive and filter the shrimp from the water as the roller arrangement tightens the boom enclosure about the shrimp colony and thereby directs that colony into proximity of the conveyor and its net-fitted frames.

Abstract: A brailing system for commercial fishing boats that speeds the process of taking the fish from the pursing net that has been gathered next to the ship and transferring the fish into the storage chambers of the ship. Novel structure for reciprocally, pivotally and rotatably supporting the rear end of the brailing pole reduces the number of men required to dip the brailing pole into the pursing net.

Abstract: A fishing vessel device having open faced pulleys attached to a pivotal plate member of a traveling assembly. The traveling assembly is winched along a slide rail attached perpendicular to a pivotal cross tee support. Another open faced pulley is attached to the cross tee support such that this pulley is in a coplanar relationship with the traveling pulleys. The cross tee support is pivotally attached to a stanchion and the stanchion is mounted adjacent to the vessel gunnel. The buoy attached end of a crab pot hauling line is retained in a fork shaped device such that when the line is also trained about the open faced pulleys a crab pot can be recovered from the water and suspended within the work area of the vessel. Rotation of the pivotal plate member will result in dumping the hauling line from the traveling pulleys. Rotation of the cross tee support will result in the lowering of the overall height of the fishing vessel.

Abstract: A mechanically driven brailer for fish from the bunt of a net includes a handle, a brailer hoop, and brail net attached to the hoop. The brailer hoop is hinged to the handle such that it maintains a coplanar relationship with the handle as both are driven downward into the fish. Release of a latch means allows the hoop to change positions relative to the handle so that the volume of the bunt swept by the hoop is maximized.

Abstract: A trolley assembly for use upon a line which is anchored in the water for retrieving a fishing net. The trolley assembly includes a weighted body member having a pair of trolley arms extending therefrom. The trolley arms are disposed at an angle to one another and are integrally associated with the body member to define a generally V-shaped assembly. The body member includes a loop disposed on a line bisecting the angle between the trolley arms for affixing a net securing line opposite the trolley arms. The trolley assembly also includes a pair of trolley wheels adapted to ride on the anchored line. One of the trolley wheels is mounted for wheel-rolling movement on each of the trolley arms. The trolley wheels are disposed in spaced relation to the body member. With these features of construction, one end of the fishing net can be secured to the trolley assembly with the net securing line and the other end of the fishing net can be controlled by a fishing line secured thereto.

Abstract: An apparatus for dredging bottom dwelling seafood such as oysters is comprised of a collecting basket pivotally carried by a frame, the basket having a pair of parallel arms rigidly fixed thereto. A pair of upright standards are mounted adjacent the edge of a boat, and each standard contains an arm receiving groove which is configured to receive the arms and pivot the basket upwardly about an axis through the arms to empty the contents of the basket. A spring loaded member slows movement of the basket as it pivots for more smoothly emptying the contents. The spring loaded member also stores potential energy for propelling the basket back into the water after it has been emptied.

Abstract: A device for throwing a casting net comprising a generally circular open top receptacle having a sidewall and a bottom, the bottom having a central portion which is substantially upwardly conical toward an apex centrally located above the sidewall and a horizontal segment, the sidewall being at an obtuse angle to the horizontal segment, and a plurality of ribs extending radially inwardly from and secured to the sidewall and the horizontal segment, and a handle on the outside of the receptacle.

Abstract: Line or net hauling apparatus is disclosed comprising a drum having a cylindrical surface from which project a plurality of generally radially extending engagement members each having a first surface element at the cylindrical surface on the opposite side of a circumferential center line from that of the adjacent members to define a sinuous path for a flexible line or net wound on the drum; edge surface elements of the engagement members being inclined with respect to the diametral axial plane in which lies the said first surface element of the engagement member, the inclination of adjacent edge surface elements being in opposite directions from one another.

Abstract: A net-hauling, power-driven block, the frame of which is suspended from a trolley movable along a track extending between upward extensions of the frame sides. A hydraulic motor on the trolley drives a pinion which engages a sector gear parallel to the trolley track so as to vary the tilt of the block sheave as required to restore seating of the moving net in the sheave groove.

Abstract: A system for the transfer of a net formed fishing gear to a bin (2) aboard a vessel (1), which in association with a pull means (5) comprises a guide means (6) which is adapted to perform a swinging movement in mutually different planes relatively to the pull means.