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 5910-01-077-5322
NSN 6145-00-771-7873
NSN 5835-00-315-3797
NSN 5855-01-450-1080
NSN 6650-01-624-6959
NSN 5990-00-152-3929
NSN 6135-01-255-9129
NSN 5925-00-981-9006
NSN 5925-00-151-9684
NSN 6620-01-048-4145
NSN 5985-01-332-3565
NSN 5855-01-540-2891