Abstract: A system and method for linearizing underwater sensor arrays is disclosed. The sensor array comprises slightly positive or negative buoyant sensors that are positioned along a cable. A weight is positioned at a deep end of the cable or a buoyant object is positioned at a shallow end of the cable, but not both. Distributing buoyant elements throughout the length of the array generates more consistent, uniformly distributed tension, enabling the sensor array to maintain a linear shape in currents of all strengths and speeds.

Abstract: A support pile assembly for an aid to navigation that is to be placed in an area where it will be subject to repeated hits by boats and barges. In one configuration the assembly comprises a foundation which is driven into the mud on the bottom and which receives the support pile, and the support pile, which slips into the foundation. The support pile comprises three sections: a lower section which fits in the foundation; a spring section that is attached to the lower section by means of a joint in such a way that it cart flex in all directions; and an upper section, rigidly fixed to the spring section, to which the aid to navigation is attached. A compression spring in the spring section gets compressed whenever the pile is hit by a ship or barge and forced out of its normal vertical position; as the spring extends back to its original length, it causes the pile to revert to the vertical position.