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USN testing AN/SPQ-9B with periscope detection capability

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USS Lake Champlain successfully executed the ‘light off’ of the AN/SPQ-9B horizon search radar upgraded with a Periscope Detection and Discrimination (PDD) capability.

SPQ-9 radome on USS Nicholson (DD-982)
By: DON S. MONTGOMERY, USN (RET) (DN-SC-02-10106) [Public domain], via Wikimedia Commons

The testing occurred off the coast of California on Mar. 12.

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