The speargun for underwater fishing comprises a metal spear provided with one or more engagement heels, a hand grip having a retaining mechanism for retaining the spear and provided with trigger for releasing the spear, a barrel having an upper longitudinal guide that slidingly supports the spear, a terminal head for engaging at least one rubber band for the propulsive thrust of the spear, the head having a front recess where at least one permanent magnet for attracting said spear is positioned.

The speargun for underwater fishing comprises a metal spear provided with one or more engagement heels, a hand grip having a retaining mechanism for retaining the spear and provided with trigger for releasing the spear, a barrel having an upper longitudinal guide that slidingly supports the spear, a terminal head for engaging at least one rubber band for the propulsive thrust of the spear, the head having a front recess where at least one permanent magnet for attracting said spear is positioned.

The speargun for underwater fishing comprises a spear, a hollow hand grip having therewithin a retaining mechanism for retaining the spear, a snap trigger of the retaining mechanism for the release of the spear, a hollow barrel fixed to the hand grip, a terminal head fixed to the barrel and supporting at least one lateral pulley on which a rubber band for the propulsive thrust of the spear is wound, and a housing for engaging one end of the rubber band, formed in a single piece with a wall of the hand grip and located in a transversal geometric plane of the speargun which includes the axis of the barrel and cuts the speargun into an upper half-part and a lower half-part.

The speargun for underwater fishing comprises a spear, a hollow hand grip having therewithin a retaining mechanism for retaining the spear, a snap trigger of the retaining mechanism for the release of the spear, a hollow barrel fixed to the hand grip, a terminal head fixed to the barrel and supporting at least one lateral pulley on which a rubber band for the propulsive thrust of the spear is wound, and a housing for engaging one end of the rubber band, formed in a single piece with a wall of the hand grip and located in a transversal geometric plane of the speargun which includes the axis of the barrel and cuts the speargun into an upper half-part and a lower half-part.

Presented is a system and method via nature-inspired design and engineering to autonomously fish, sort and deliver the catch. It implements rope-less fishing via a novel variable buoyancy device and an autonomous aerial and underwater vehicle as a fishing gear carrier. Its versatile capabilities are comprised of the AI sorting capability to comply with regulations, the capability to capture renewable energy to reduce operating costs, the capability to both passively fish with bait and proactively hunt for fish and the capability to gather intelligence to find optimal fishing grounds.

Presented is a system and method via nature-inspired design and engineering to autonomously fish, sort and deliver the catch. It implements rope-less fishing via a novel variable buoyancy device and an autonomous aerial and underwater vehicle as a fishing gear carrier. Its versatile capabilities are comprised of the AI sorting capability to comply with regulations, the capability to capture renewable energy to reduce operating costs, the capability to both passively fish with bait and proactively hunt for fish and the capability to gather intelligence to find optimal fishing grounds.

Presented is a system and method via nature-inspired design and engineering to autonomously fish, sort and deliver the catch. It implements rope-less fishing via a novel variable buoyancy device and an autonomous aerial and underwater vehicle as a fishing gear carrier. Its versatile capabilities are comprised of the AI sorting capability to comply with regulations, the capability to capture renewable energy to reduce operating costs, the capability to both passively fish with bait and proactively hunt for fish and the capability to gather intelligence to find optimal fishing grounds.

A submersible (10) and method of using a submersible for capturing a target species comprising: at least one controllable thruster (14) for manoeuvring the submersible; at least one camera (12) for capturing images to allow the identification of an individual of a target species; a catapult mechanism (33) wherein the catapult mechanism is reversibly moveable between a released configuration and a primed configuration by an activatable motor, and wherein the catapult mechanism may be loaded with a retractable device mounted on the catapult mechanism, and the retractable device may be launched from the submersible by being propelled by the catapult mechanism; a container for receiving a captured individual.

A submersible (10) and method of using a submersible for capturing a target species comprising: at least one controllable thruster (14) for manoeuvring the submersible; at least one camera (12) for capturing images to allow the identification of an individual of a target species; a catapult mechanism (33) wherein the catapult mechanism is reversibly moveable between a released configuration and a primed configuration by an activatable motor, and wherein the catapult mechanism may be loaded with a retractable device mounted on the catapult mechanism, and the retractable device may be launched from the submersible by being propelled by the catapult mechanism; a container for receiving a captured individual.

The invention relates to a speargun handle (1) having a reinforced trigger guard (5) which creates a chamber (6) in which there is a trigger lever (7). The handle (1) has a retaining member (10) with chambers (12) surrounded by a non-slip retaining cover (11). It also has a loading aid (17), a front end (23) for fitting a tube (2), incorporated deflectors (25) for lines and a line holder (32). The handle (1) further comprises a reverse trigger mechanism, wherein the trigger lever (7) is located outside the cartridge (26). The retaining hook (27) may alternatively have a notch for a pivot pin (38) which receives the developing stresses derived from the shaft's (4) launching.