Means for increasing the efficiency of an ice disaggregation sys

Method and apparatus for breaking ice with water

Method and means for increasing the maneuverability of a ship in

Method and the means for removing ice from a ship's channel

Method for aerating bodies of water

Method for changing the characteristics of a ship and a hull for

Method of adding propulsive force to ice breaker

Method of and apparatus for disaggregating particulate matter

Navigation in ice covered waterways

Operations vessel for ice covered seas

Sailboat keel

Ship

Ship's hull

Shipboard ice lubrication system and jet pump for use therein

Shipboard ice lubrication system and jet pump for use therein

Stern apron for ice breakers