HYBRID MULTIMODAL FISHERY BUILT INTO SMALL PELAGIC AREAS

摘要

The invention relates to a catamaran (1), the propulsion systems (2) of which are positioned on the outer surfaces of shells (3) enabling the propellers of a rotary seine to be disengaged, forming a bag in which the fish is trapped (4) and wedging the former into the rear tunnel. Flat bridge traps (5) enable the “power unit” (6) positioned on a gantry crane (7) to exert a vertical force on the seine, which is closed by means of winches (8). This configuration enables work to continue despite the presence of waves (9), the fishing rigging not negatively affecting the stability of the ship, the fish (10) being discharged using a pump or a “brail net” onto a net receptacle (11) placed above a hopper (12) that receives a set of sieves or grates (13) enabling juveniles and seawater to be returned to the sea, the fish then being placed in refrigerated vats (14) of seawater to bring the temperature of the fish down quickly and from which the fish is extracted by conveyor belts (15) and then deposited on processing lines (16) enabling pre-evaluation to be undertaken, which comprises sorting by species and size as well as packing (17), nobbing (18) or freezing (19), the fish thus sorted, sized and processed being moved to positive or negative cold airlocks (20) in which the fish is subjected to the final phases of packaging and operation and quantity and quality control before being loaded into standardized insulated or refrigerated containers (21) onboard which the rotary seine is placed and temporarily stored (22). Once the catch has been loaded, the traps (23) are closed back up and the seine is lifted onto the rear bridge, ready to be drawn (24) for the next fishing action. Propulsion is provided by four thick sails having the shape and profile of airplane wings (25) which, by means of wind forces, move the ship, which generates water flows causing underwater generators (26), which are concentric with the propulsion system and comprise a shaft line (27) with a helix, at the perimeter of which a pipe (28) is located having stator functions surrounded by the rotor (29), to which are rigidly to rotor blades (30) which, set in rotation by the forward motion of the ship, generate a continuous electrical current powering electric motor batteries (31) for driving the propulsion helixes and refrigeration units of the containers that are loaded and unloaded using cranes (32). The drop in temperature of the containers and maintaining the temperature thereof are provided by the combined use of the energy from wind turbines (33) and from a solar panel (34) installed on land, said elements being connected to batteries (35) and to a power station (36) enabling direct current to be converted into controlled alternating current. In the event of insufficient wind or sun, electricity-generating units on land (37) and onboard (38) provide the production of electricity to maintain the temperature of the containers as well as the supply of electricity. The sails consist of sheets (39) stretched by ribs (40) supported by masts (41) and rigidly connected to a directable sprit (42), the sails having a thick aerodynamic profile (43), the curvature of which is obtained using rudder bars (44) arranged at each batten. The sail can have a symmetrical profile, in which case the exerted aerodynamic forces (45) and (46) cancel each other out or are unsymmetrical and in which case the force on the lower surface (47) is higher than that generated by the upper surface (48), as a result propelling the ship in conjunction with the hydrodynamic effects of the hull. In the absence of wind, electricity production is provided by solar collectors assembled by panels (49) supported at the base thereof by the sprit (42) and retracted into the body of the sail. Lowering the sail reveals the collectors, the planar surfaces of which can be exposed orthogonally to the sun (50) by the rotating masts (51) and by the angle of the panels (52) hinged onto the sprit (42), the amplitude being adjusted by cables (53) that rise to the masthead (54) and descend back down the legs of the mast (55).