A fixed number of components and/or items, not all having the same basic name, which utilizes sound waves for underwater communications.
Classification: Parts & accessories for direction finding compasses and other navigational instruments and appliances
NSN 6320-01-411-9222
NSN 6610-01-130-0744
NSN 6320-00-445-1187
NSN 6220-01-359-3993
NSN 6240-01-122-7391
NSN 5965-00-804-8098
NSN 5998-00-180-2480
NSN 6240-01-361-3499
NSN 5910-01-480-9512
NSN 6650-01-434-0331
NSN 5965-00-408-5501
NSN 6135-00-497-0491