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 5998-01-433-3216
NSN 6150-00-284-2976
NSN 5960-01-432-6038
NSN 5925-01-273-0711
NSN 4140-00-925-5188
NSN 6105-01-633-4592
NSN 5975-01-442-8585
NSN 2925-00-388-8932
NSN 6645-01-005-8622
NSN 6135-00-491-9864
NSN 7035-01-361-8821
NSN 5985-01-406-5209