A marine anchoring device (1, 33) for penetration into a sea bed is having at least part of its external surface in the form of a low friction surface (8, 12, 13, 14). The device can comprise (a) a drag embedment anchor (1) or alternatively (b) a direct embedment anchor (1A). The low friction surface can be formed by a low friction coating which is adhered to the external surface of the device, or by a coating which is smeared onto the external surface. A lubricant supply apparatus (16, 19) can ...

A weed cutting apparatus for use in water is disclosed. The weed cutting apparatus would be designed to cut weeds within a body of water without having the weeds tangle on the present invention.

A marine speedometer system is disclosed which utilizes a short pitot tube or air column. The speedometer system includes an inlet having a short air column, a transducer, a control circuit, and a display. The electric signal from the transducer is representative of the pressure in the short air column. The control circuit preferably utilizes a microprocessor and a look-up table to generate a display signal in response to an electric signal from the transducer. The look-up table includes T-Buoy ...

A through-hull speed sensor of the magnetized paddlewheel sensor type wherein a paddlewheel is rotatably supported in a cavity adjacent a magnetic sensing device which generates electrical pulses corresponding to paddlewheel speed as the wheel rotates when the vessel moves through water. The sensor has improved linearity provided by a flow channel recessed in a downstream surface of a sensor mounting member. The recessed flow channel raises the trailing edge above the leading edge, thereby reduc...

A marine marker providing a service life, both of the structural rigidity as well as the surface finish that is presently unknown in the industry. The present invention utilizes the structural features of a high strength, readily formable plastic resin material in layers of high density polyethylene, nylon 6/6 and ethylene vinyl alcohol and employs a specialized manufacturing technique to provide a net shape of layered resin materials in the marker further enhancing its physical rigidity and ser...

Disclosed herein is marine apparatus comprising a boat including a hull, an outboard motor including a propulsion unit having a rear side and mounted on the hull for pivotal movement relative thereto between a trimmed-in position, a tilted-up position, and a trimmed-out position between the trimmed-in position and the tilted-up position, a cover which extends above the propulsion unit and which is mounted on the hull for movement relative thereto about an axis located forwardly of the rear side ...

A retaining wall, preferably for marine use, constructed of a plurality of corrugated panels. The corrugated panels of the wall are anchored in the earth behind the wall by a plurality of vertically spaced, horizontally extending lengths of sections of geogrid material. Geogrid sections are secured to the wall made up of a plurality of corrugated panels by walers secured to the wall. One waler is positioned on an exterior surface of the wall. An upper interior waler section and a lower interior ...

The carrier includes a cradle having an elongated spine and a number of ribs which are spaced along the length of the spine. The spine is pivotally attached to a larger boat such that an end of the spine may be raised or lowered. When the end of the spine has reached its lowermost extent, it is immersed in water and allows a smaller boat to be floated into the cradle. When the end of the spine is raised to its uppermost extent, the smaller boat is lifted entirely out of water. A hoist or actuato...

A marine instrument includes a housing, a processor for processing an input signal comprising vessel navigation information, a substantially water resistant display connected to the processor, the display having at least one control switch extending outwardly from the display, a removable face plate having a window, a front surface, and a back surface, the removable face plate having at least one substantially flexible raised portion along the front surface forming a complementary concavity alon...

The instant invention describes an advanced marine propulsor that has a rotor that is, at least in its majority, enclosed by structure where the rotor, in its preferred embodiment, receives water over at least a majority of its lower portions and gas over at least part of its upper portions. It is possible to delete the gas flow by use of a valve or structure so that an approximate doubling of water flow rate occurs which is valuable as a thrust enhancer for low and mid-range marine vehicle spee...