An item which is part of a sonar dome or sonar transducer and which is so constructed as to afford little attenuation to sonar frequencies while aiding to cut down the water resistance of the part with which it is used.
Classification: Ship' logs and depth-sounding apparatus for navigation
NSN 5920-01-365-9930
NSN 6145-00-172-6488
NSN 6220-01-366-6747
NSN 6320-01-515-7913
NSN 6320-01-592-6248
NSN 5835-01-514-5758
NSN 6150-00-644-8745
NSN 5985-01-440-9257
NSN 6130-00-452-1486
NSN 6240-01-406-2317
NSN 5920-00-127-9992
NSN 2925-01-273-4898