Marine structures adapted to be installed in relatively shallow bodies of water, such as for use in storing boats and in defining pier structures. The marine structures are arranged to be stored subjacent the water surface during winter months and more specifically, below the freeze zone of the body of water in which they are placed, thereby to avoid movement of the structures resulting from movement of the ice on the water surface. The structures are selectively positionable in a normal use arr...

A reactive type marine muffler which combines principles of both baffled construction and expansion chamber attenuation with a liquid flow path to provide improved sound attenuation over a broad spectrum of octave bands and a substantially lower dB(A). The baffles are preferably dome-shaped with their apices directed counter to the flow through the muffler and the expansion chambers are interconnected by a connecting tube mounted in a median baffle and projecting into adjoining expansion chamber...

A marine platform for offshore installation has a fixed central platform and an annular arrangement of floating dock units positioned thereabout arranged for movement therearound and vertical movement responsive to wave and water level changes. The annular arrangement of floating dock units accommodate the docking of ships and barges which may be rotated about the marine platform by rotary motion imparted the dock units.

A boat hook is provided with a series of attachments engagable with a coupling device on the prod end. The coupling preferably includes a threaded section, and is set back from the point of the prod for the dual purpose of protecting the threads, and for utilizing the point as the means of assuring positive coaxial alignment of the coupling. The attachments provide a variety of areas of utility, and the preferred form of the invention has a telescoping handle capable of being locked in a plurali...

The marine bumper comprises a body including two oppositely extending wings which are centrally engaged to a base in a manner to be rotatable relative thereto, such that the wings may be horizontally or vertically oriented. Also, the bumper is adapted for engagement to a cleat of a boat by an extension arm, if such mounting, rather than dock mounting, is desired.

A compressor having a corrosive resistant coating is disclosed. The coating has a first spray coated metallic layer. A sealant layer is disposed over the sprayed metallic coating which has an organic component, a solvent component, and an inorganic phase.

A marine engine is arranged such that it compares a detected ion current value with a predetermined sea water-ingress current value, which is indicative of sea water being present in the combustion chamber at the time of combustion.

An improved marine riser is described which is comprised of a plurality of conduit sections joined together end to end. Buoyancy cans for retaining a compressed gas are flexibly connected to the riser at selected locations along its length and form a fluid tight seal therewith.

A marine structure having a buoyant tower flexibly connected to a base on the sea bed. The buoyant tower includes a buoyant tank which is movable in guide tracks extending lengthwise of the tower. The base may have drive tracks for moving along the sea bed so that material gathering, pipe laying or harbour construction operations on the sea bed can be carried out. For pollutants disposal the tower may receive waste, mix it with sea water and diffuse it into the sea.

An expendable instrument for determining salinity versus depth in a water column and suitable for use from vessels underway, from helicopters, and from fixed platforms. The salinity indication is obtained by the use of a conductivity cell for measuring the water conductivity, and a standard cell for measuring the conductivity of a standard sample, and obtaining the conductivity ratio. The resultant is transmitted up a wire link to processing equipment.