Original Item: Only One Available. Now this is a wonderful opportunity to add a great example of the Mk 82 “Practice Depth Charge” to your ordnance collection. This was produced without any explosive content and is labeled NONEXPLOSIVE on the side of the body. The round is totally inert and unable to be used as an explosive device, making it in total compliance with the current BATF standards governing ordnance. Measures 15 inches in overall length.

Not Available For Export.

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 Anti-Submarine Warfare weapon during a tactical exercise. It may be dropped or deployed from fixed-wing 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. The first four of these coded signals are formed by alternating between two acoustic frequencies for various durations in accordance with a timing sequence that is defined in the code table. The fifth coded signal consists of only one continuous tone. 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 (or bottom) 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.

A lovely example with complete markings that come more than ready for further research and display.