A trailering support device able to load a hull onto a trailer includes one or more controllers configured or programmed to acquire characteristic information indicating a relationship between a steering angle of the hull and a turning radius of the hull; acquire relative position information between the trailer and the hull; detect the steering angle of the hull; predict future movement of the hull based on the acquired characteristic information, the acquired relative position information, and the detected steering angle; generate a predicted trajectory; and provide notification of a positional relationship between the hull and the trailer and provide notification of the generated predicted trajectory.

The invention relates to a system (1, 2) (1, 4) for handling marine (3) or underwater (5) drones, the system (1, 2) (1, 4) comprising a drone interface module (2, 4) and a floating pontoon (1) with two hulls (11) and an arch (10), the pontoon (1) is catamaran-shaped and delimits a downflooded reception space (17), the arch (10) comprises at least one device (12) for attachment to a winch cable, the pontoon (1) comprises devices (13) for detachable attachment to a drone interface module (2, 4) detachably and interchangeably installed in the receiving space (17), the drone interface modules (2, 4) forming an at least partially flooded docking area (23, 42) for the drone (3, 5), the drone interface modules (2, 4) have a lower portion (22, 43) configured to rest stably on a flat surface after the drone interface module (2, 4) has been removed from the pontoon (1).

Convertible water-side accessory structures and devices make up a system that can be mounted or installed on vehicles, boats, boat docks, or water-side structures in, around, or in close proximity to ponds, lakes, creeks, streams, rivers, natural or man-made pools, oceans, or sea-side applications for recreational, industrial and/or commercial uses at or near the water level including: a water level bench convertible to a dry diving platform, or dry bench, or shelf or other use; a secondary below water footrest/bench when combined with the water level bench, can be converted to a high-level bench, a tabletop, a shelf, dry stow or other uses; a water level ladder convertible to become dry tiered seating, tiered shelving, tiered tabletops or other uses; a water level watercraft support convertible to become a dry diving platform, dry bench, or shelf; and a jib hoist assembly for line attachment to a watercraft.

Convertible water-side accessory structures and devices make up a system that can be mounted or installed on vehicles, boats, boat docks, or water-side structures in, around, or in close proximity to ponds, lakes, creeks, streams, rivers, natural or man-made pools, oceans, or sea-side applications for recreational, industrial and/or commercial uses at or near the water level including: a water level bench convertible to a dry diving platform, or dry bench, or shelf or other use; a secondary below water footrest/bench when combined with the water level bench, can be converted to a high-level bench, a tabletop, a shelf, dry stow or other uses; a water level ladder convertible to become dry tiered seating, tiered shelving, tiered tabletops or other uses; a water level watercraft support convertible to become a dry diving platform, dry bench, or shelf; and a jib hoist assembly for line attachment to a watercraft.

During a boat launch operation: receiving image data from at least one camera supported by the vehicle as the tow vehicle and trailer move in a reverse direction towards a body of water; determining a hull-pitch angle, an overlap ratio between a lower half of a hull of the boat and the water, and a submersion depth ratio measured from a hull keel of the boat; and transmitting an instruction to a user interface of the vehicle or a drive system thereof to cease movement of the tow vehicle and trailer in the reverse direction based upon the hull-pitch angle, the overlap ratio, and the submersion depth ratio all exceeding respective predetermined thresholds for at least a predetermined number of consecutive image frames.

During a boat launch operation: receiving image data from at least one camera supported by the vehicle as the tow vehicle and trailer move in a reverse direction towards a body of water; determining a hull-pitch angle, an overlap ratio between a lower half of a hull of the boat and the water, and a submersion depth ratio measured from a hull keel of the boat; and transmitting an instruction to a user interface of the vehicle or a drive system thereof to cease movement of the tow vehicle and trailer in the reverse direction based upon the hull-pitch angle, the overlap ratio, and the submersion depth ratio all exceeding respective predetermined thresholds for at least a predetermined number of consecutive image frames.