According to an embodiment of the present disclosure, a vessel includes: a hull 100 provided with a propellant 140; a deck 200 spaced apart from the hull 100; and a support 300 between the hull 100 and the deck 200, the support 300 configured to support 300 the deck 200 with respect to the hull 100, wherein the hull 100 is disposed below a water surface during operation, and the deck 200 is supported by the support 300 to be disposed above the water surface during operation.

An alternating Open Chamber Cavity for employing a very useful safe and controllable new lifting plus lubricating hydrodynamic force for effectively improving marine transportation in a seaway, I named SAFELY CONTROLLED, AUTOMATED WATER DISSECTED LUBRICATION AND LIFT FORCE, has been discovered and innovated for use by myself; and I have also invented the automated mechanism I named “FLEXIBLE POWER-FINS”, for controlling the safe exploitation of this beneficial natural phenomenon, as well as innovated a way to significantly improve the turning capabilities of a watercraft in motion.

An alternating Open Chamber Cavity for employing a very useful safe and controllable new lifting plus lubricating hydrodynamic force for effectively improving marine transportation in a seaway, I named SAFELY CONTROLLED, AUTOMATED WATER DISSECTED LUBRICATION AND LIFT FORCE, has been discovered and innovated for use by myself; and I have also invented the automated mechanism I named “FLEXIBLE POWER-FINS”, for controlling the safe exploitation of this beneficial natural phenomenon, as well as innovated a way to significantly improve the turning capabilities of a watercraft in motion.

A drainage device for directing fluid away from a thru-hull fitting located on a hull of a vessel includes: a channel body mountable proximate to and extendable away from the hull of the vessel; a groove formed along at least a partial length of the thru-hull body; and a lip protruding from a bottom edge of the channel body at an end of the channel body that is distal from the hull of the vessel when the drainage device is mounted thereon.

An electric current supply system (20) is designed to be at least partially submerged in an electrically conductive liquid during operation thereof, and having at least one electrically conductive component (21, 22, 23, 24) enveloped in liquid-tight material (40). The component (21, 22, 23, 24) has a sacrificial material that is capable of reacting electrochemically with the liquid. Further, the component (21, 22, 23, 24) has at least one gas trap portion (50) at which the sacrificial material occupies a space in the liquid-tight material (40) that is thereby defined with a gas trapping shape. If, in case of damage to the system (20) in an actual submerged state thereof, the component (21, 22, 23, 24) gets exposed to the liquid, it is achieved that an electrochemical reaction occurring at the exposed area of the component (21, 22, 23, 24) and an outflow of electric current to the liquid are stopped.

An electric current supply system (20) is designed to be at least partially submerged in an electrically conductive liquid during operation thereof, and having at least one electrically conductive component (21, 22, 23, 24) enveloped in liquid-tight material (40). The component (21, 22, 23, 24) has a sacrificial material that is capable of reacting electrochemically with the liquid. Further, the component (21, 22, 23, 24) has at least one gas trap portion (50) at which the sacrificial material occupies a space in the liquid-tight material (40) that is thereby defined with a gas trapping shape. If, in case of damage to the system (20) in an actual submerged state thereof, the component (21, 22, 23, 24) gets exposed to the liquid, it is achieved that an electrochemical reaction occurring at the exposed area of the component (21, 22, 23, 24) and an outflow of electric current to the liquid are stopped.

The present invention is a device to reduce the skin friction drag on the hull surface of a marine vehicle. The device is in a form of a channel having a wider portion facing an incoming water stream (inlet) and a narrower portion (outlet) installed over an air orifice on the hull surface, forming an array of channels. A stream of water, generated by a marine vehicle motion, enters the channels and creates a low pressure region that pulls the air into the stream of water through the air intake holes, creating a stream of air bubbles. This structure increases water flow velocity close to each air orifice, creates larger turbulent components passing through and over each channel, injects more bubbles, and avoids dispersion of air bubbles to improve the existing skin friction drag.

The present invention is a device to reduce the skin friction drag on the hull surface of a marine vehicle. The device is in a form of a channel having a wider portion facing an incoming water stream (inlet) and a narrower portion (outlet) installed over an air orifice on the hull surface, forming an array of channels. A stream of water, generated by a marine vehicle motion, enters the channels and creates a low pressure region that pulls the air into the stream of water through the air intake holes, creating a stream of air bubbles. This structure increases water flow velocity close to each air orifice, creates larger turbulent components passing through and over each channel, injects more bubbles, and avoids dispersion of air bubbles to improve the existing skin friction drag.

The novel bladder systems and tie down systems set forth herein provide systems and apparatuses that mitigate or prevent damage, such as tipping over/capsizing, of a watercraft stored on shore or an aircraft secured to a ground surface during adverse wind, rising water, or storm events. Further, novel apparatuses and methods for storing a watercraft using the bladders as cushioning or holding devices when installed within a cavity, whether the cavity is created by digging a hole or building an enclosing berm, provides additional stability and security for the watercraft during adverse wind, rising water, or storm events.

A marine thru-hull fitting drainage device for directing fluid away from a thru-hull fitting installed through a bore in a hull of a vessel includes: an elongate thru-hull body forming a channel and having a flange formed on an end thereof; a channel body formed on a face of the flange and extending away from the hull of the vessel, the channel body forming a drainage channel for directing water from the channel of the thru-hull body away from the hull of the vessel; a groove formed in the channel body; and a lip protruding from a bottom edge of the channel body.