Patent ID: 8537011

Claim:
A fence for establishing a secure marine perimeter, comprising: a platform constructed to float on a surface of a body of water, the platform defining a top surface; at least two uprights extending above the top surface of the platform to a predetermined height; an optic fiber net having a top end and a bottom end, the optic fiber net being disposed adjacent to the uprights and extending from a first predetermined, point above the surface of the body of water to a second predetermined point below the surface of the body of water, wherein the optic fiber net includes at least one optic fiber wire, the optic fiber wire having an input end and an output end; at least one first elastic member connecting one portion of the optic fiber net to another portion of the optic fiber net to establish at least one fold in the optic fiber net, wherein the at least one first elastic member is configured to expand when the platform moves at least in response to movement of the body of water; a light transmitter connected to the input end to introduce an input optic signal into the optic fiber wire; a light receiver connected to the output end to receive an output optic signal from the optic fiber wire; and a processor connected at least to the light receiver to generate an output signal based at least on the output optic signal, to compare the output optic signal with the input optic signal, and to generate an alarm if a difference between the input optic signal and the output optic signal exceeds a predetermined alarm threshold.