F MIL-S-23311A VALID NOTICE L 13 B 9999906 0488396 7 mm I INCH-POUND I MIL-S-23311AIAS) NOTICE 1 25 September 1991 MILITARY SPECIFICATION SIGNAL, UNDERWATER SOUND, MARK 61 MOD O AND MARK 64 MOD O MIL-S-23311A(AS), dated 2 June 1977, has been reviewed and determined to be valid for lise in acqiiisition. Preparing activity: Navy - AS a AMSC NIA FSC 1361 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
