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Maritime Telecommunications
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THE THEORY OF SEARCH

Effective 01 August, 2013, the U. S. Coast Guard terminated its radio guard of the international voice distress, safety and calling frequency 2182 kHz and the international digital selective calling (DSC) distress and safety frequency 2187.5 kHz. Additionally, marine information and weather broadcasts transmitted on 2670 kHz will terminate concurrently. See the safety alert. Note that these frequencies are still available and in use, notwithstanding the Coast Guard's termination of the radio guard. Please contact us if you have any questions.


The Theory of Search, a book of the scientific basis for search planning prepared by Mr. J. R. Frost of Soza & Company, Ltd., of Fairfax, Virginia, U.S.A., in cooperation with the U.S. Coast Guard, is available at no charge.

You may download it directly from our web server. It is a 2.5MB PDF document. Right-click on the link and click on "Save target as...".