MIL-C-81861 Control, Depth, Torpedo C-7821/AThe equipment covered by this specification shall be for airborne use and shall provide for inflight manually selecting depth settings of the Mk 44 Mod 0 or Mod 1 Torpedo or the search depth and ceiling settings of the Mk 46 Mod 0 or Mod 2 Torpedo prior to their release from the carrying aircraft. In addition, the equipment shall be capable of selecting the SNAKE mode gyro settings of the Mk 46 Mod 1 and the HATS mode gyro settings for the Mk 46 Mod 2 Torpedos. Also, a visual indication that the torpedo setting matches the selected setting shall be provided.