A Method and Apparatus for Wake Enlargement System have been disclosed. By using water pick-ups that are mounted on a boat, controlled filling of ballast tanks is possible without the use of pumps.

A Method and Apparatus for Wake Enlargement System have been disclosed. By using water pick-ups that are mounted on a boat, controlled filling of ballast tanks is possible without the use of pumps.

A system that controls an impact load resulting from a fluid under an internal/external force is provided. The system senses an impact load, of a fluid under an internal/external force and attenuates the impact load. The present invention includes a floating means arranged horizontally inside an amount of fluid in an open space or in a sealed interior, a position adjustment means is vertically connected to the floating means and positioned inside the fluid, a sensing means disposed inside the fluid, on the floating means, the position adjustment means, or a structure in the periphery senses a measurement object. A controller predicts/monitors and predicts/controls fluid dynamics-related forces, hull stress, six-degree-of-freedom movements, and positions in connection with a transportation means or maritime structure. The floating means, the position adjustment means, and the sensing means are installed thereon, and use the value from the measurement object transmitted from the sensing means.

A device (100) has surfaces (21, 22, 23, 24) and an anti-biofouling system (10) comprising at least one light source (11, 12) for performing an anti-biofouling action on at least a majority of the surfaces, the at least one light source (11, 12) being adapted to emit rays of anti-biofouling light. The surfaces (21, 22, 23, 24) are configured relative to each other and to the at least one light source (11, 12) such that during operation of the at least one light source, at least a majority of the surfaces (21, 22, 23, 24) is free from shadow with respect to the rays of anti-biofouling light from the at least one light source (11, 12), wherein it may be possible for the rays of anti-biofouling light to reach the surfaces (21, 22, 23, 24) by skimming along the surfaces (21, 22, 23, 24).

An exemplary method for a marine vessel having a propeller mounted to a rotatable shaft for converting rotative shaft power transferred from the shaft to the propeller into thrust to propel the marine vessel across water, includes obtaining measurement values that are descriptive of the shaft power, the thrust and speed through water of the marine vessel; separately estimating at least one of first excess shaft power caused by fouling of the propeller and second excess shaft power caused by fouling of the hull of the marine vessel; and issuing an indication of propeller cleaning in dependence of the first excess shaft power and hull cleaning in dependence of the second excess shaft power.

An apparatus for repairing an impact damage on a hull includes a body having a through hole along a center axis thereof, an anchor unit provided on one side of the body and configured to be inserted into the hull through the impact damage and to be hooked on an inner wall of the hull, and an elastic member inserted into the through hole and having a first side fixed to the anchor unit and a second side fixed to the body.

A ship model having an elongated ship body configured in such a way that the ship body is divided over its longitudinal extent (L) into a plurality of segments that can move relative to one another and can be lowered below a water surface.

A watercraft with improved safety and stability is provided. The watercraft includes a shell defining a plurality of raceways for receiving water during certain maneuvers of the watercraft, thereby excerpting force upon the watercraft in a first direction. The shell is configured so as to prevent or otherwise inhibit the water from excerpting an opposed second force upon the watercraft. An intermediate panel of the shell provides increased flexibility, thereby serving as a shock absorber for the watercraft.

An exemplary method is disclosed for estimating operational efficiency of a marine vessel with a propeller mounted to a rotatable shaft for converting rotative shaft power transferred from the shaft to the propeller into thrust to propel the marine vessel across water, the method including obtaining a respective time series of values for operating parameters of the marine vessel; constructing a multi-dimensional power matrix for a first time period based on operating parameter values within a respective sub-series thereof that represents a first time period; computing, for one or more propulsion parameters, fouling values based on information stored in the power matrix and information stored in a base matrix, of a reference fouling level; and creating indications concerning operating status of the marine vessel in dependence of the fouling values.

Floating vessel with a buoyant hull for cargo, with a load line presentation device affixed to the buoyant hull without interrupting water flow along the buoyant hull the load line presentation device presenting: a baseline load line indicator plimsoll mark and a plurality of decreased capacity load line indicator plimsoll marks, with a decreased capacity model in memory connected to a processor in communication with the load line presentation device; configured for automatically integrating a plurality of variables including: wave size, wave period, wind speed, surface current, vessel length, type of vessel, quantity of disconnected superstructures, quantity of sheer, bow height, a port specific draft restriction, a canal specific draft restriction, and identifying decreased capacity load line plimsoll mark for a voyage of the floating vessel, the decreased capacity load plimsoll mark restricting baseline capacity of the buoyant hull from 1% to 50%.