HC Deb 27 January 1976 vol 904 c135W
Mr. Alan Clark

asked the Secretary of State for Defence how many unidentified traces of submarine activity have been recorded by ships of the Royal Navy in the last year; and whether any of these have occurred inside United Kingdom territorial waters.

Mr. Robert C. Brown

Unidentified traces of underwater activity detected by the Royal Navy world wide are to numerous to justify recording. I can confirm, however, that no unexplained submarine contacts have been made within UK territorial waters during the last year.

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