A personal water craft includes a hull; a deck attached to, or integral with, the hull; a foot well having a foot well floor that is configured to receive a foot of a user of the personal water craft; and a drainage system configured to drain liquid from the foot well, the drainage system having a tube extending from the foot well floor to a location outside the hull.

A personal water craft includes a hull; a deck attached to, or integral with, the hull; a foot well having a foot well floor that is configured to receive a foot of a user of the personal water craft; and a drainage system configured to drain liquid from the foot well, the drainage system having a tube extending from the foot well floor to a location outside the hull.

Described herein is an unmanned water vehicle comprising two or more hulls, a retractable sensor apparatus, a wireless communications device, a steerable drive apparatus, a mobility and control module providing operation of the unmanned water vehicle, and a power system comprising: one or more solar panels and an energy storage device, wherein the unmanned water vehicle is capable of continuous operation for a period of at least 3 months.

Described herein is an unmanned water vehicle comprising two or more hulls, a retractable sensor apparatus, a wireless communications device, a steerable drive apparatus, a mobility and control module providing operation of the unmanned water vehicle, and a power system comprising: one or more solar panels and an energy storage device, wherein the unmanned water vehicle is capable of continuous operation for a period of at least 3 months.

A personal water craft includes a hull; a deck attached to, or integral with, the hull; a foot well having a foot well floor that is configured to receive a foot of a user of the personal water craft; and a drainage system configured to drain liquid from the foot well, the drainage system having a tube extending from the foot well floor to a location outside the hull.

A marine thru-hull fitting drainage device includes: a channel body having a substantially U-shaped cross-sectional area along a length of the body such that the body forms a channel for directing fluid within the body, the body extending from a first end proximate to the hull of the vessel when the drainage device is installed and a second end that is distal from the hull of the vessel, wherein the second end extends beyond an edge of the thru-hull fitting; and a ring having an inner diameter that is at least as wide as a diameter of the bore in the hull of the vessel, the resiliently flexible channel body attached to the ring at the first end of the channel body. The drainage device is secured to the hull of the vessel by securing the ring between the thru-hull and the hull of the vessel.

A marine thru-hull fitting drainage device includes: a channel body having a substantially U-shaped cross-sectional area along a length of the body such that the body forms a channel for directing fluid within the body, the body extending from a first end proximate to the hull of the vessel when the drainage device is installed and a second end that is distal from the hull of the vessel, wherein the second end extends beyond an edge of the thru-hull fitting; and a ring having an inner diameter that is at least as wide as a diameter of the bore in the hull of the vessel, the resiliently flexible channel body attached to the ring at the first end of the channel body. The drainage device is secured to the hull of the vessel by securing the ring between the thru-hull and the hull of the vessel.

Disclosed is a device for the automatic sinking of containers and hulls, including: valves, installed in a first closed configuration and having an airtight seal, susceptible of assuming a second configuration that is irreversibly opened when the external pressure exceeds a predetermined tolerance threshold, the second open configuration being adapted to make air exit from the internal space and make water enter from the outside, the at least two valves being positioned in proximity to two edges, opposite each other, belonging to two lateral surfaces of a container; support which surrounds each valve and adheres to the lateral surface of the container, by way of a coupling system that is adapted to ensure impermeability; protection grids, one placed on the outer side and one on the inner side of each valve, adapted to protect from impact and from extraneous objects which could compromise the functioning thereof.

Disclosed is a device for the automatic sinking of containers and hulls, including: valves, installed in a first closed configuration and having an airtight seal, susceptible of assuming a second configuration that is irreversibly opened when the external pressure exceeds a predetermined tolerance threshold, the second open configuration being adapted to make air exit from the internal space and make water enter from the outside, the at least two valves being positioned in proximity to two edges, opposite each other, belonging to two lateral surfaces of a container; support which surrounds each valve and adheres to the lateral surface of the container, by way of a coupling system that is adapted to ensure impermeability; protection grids, one placed on the outer side and one on the inner side of each valve, adapted to protect from impact and from extraneous objects which could compromise the functioning thereof.

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.