MIL-T-18490A (NOTICE 1), MILITARY SPECIFICATION: TRANSDUCER, FLUID, SONAR (19-AUG-1981) [NO S/S DOCUMENT]

MIL-T-18490A (NOTICE 1), MILITARY SPECIFICATION: TRANSDUCER, FLUID, SONAR (19-AUG-1981) [NO S/S DOCUMENT]. Specification MIL-T-18490A is hereby cancelled. There is no superseding document.