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Mark 84 Mod 1 Signal Underwater Sound Device.
MK-84 MOD 1 SUS. Air to Submarine Communications Device.
The SUS MK-84 Mod 1 underwater sound signal device is an expendable electro-acoustic device which provides one-way acoustic communications with submarines. It can also be used to simulate the drop of an ASW weapon during a tactical exercise. It may be dropped or deployed from fixed-wi aircraft or helicopters as well-as by over-the-side ship-launched methods
The SUS MK-84 Mod 1 is able to transmit any one of five pre-selected coded acoustic signals, each of which may convey a predetermined message to the submarine. Four of these signals consist of a continuous tone that alternates in frequency in accordance with a timing sequence defined in the coded table (see specification). The fifth code is a continuous tone at a single frequency. Third harmonics of the fundamental frequencies are also generated at levels slightly less than those of the fundamentals. A five position switch on the side of the unit accomplishes the settings.
The MK-84 is designed to provide a source level of 160 dB/uPa within 2 seconds of water entry throughout the life of the unit.
Electronic SUS No Explosives
Activation Following Water Entry Seconds (max)
Life
#70 Seconds
Multiple Tone Selections (Codes) Five
Under Water Decent Rate #15 ft per Second
NSN 1360-01-037-0588
Sonobuoy Tech Systems supplies US-specified sonobuoy products and support to the international market. Phone: 260.248.3503 Fax: 260.248.35 TO Website: www.sonobuoytechsystems.com
Approx length 15", Approx width 3", Approx weight 6lbs.
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