Nuclear Depth Charge Fired By Destroyer USS Agerholm. May 1962. The submarine USS Razorback (SS-394) participated in the "SWORDFISH" nuclear weapons test. An ASROC with a nuclear depth charge warhead was fired by the destroyer Agerholm (DD-826) at a target raft from a range of 2 nautical miles. Razorback was submerged at periscope depth 2 nautical miles from the target raft. The ASROC weapon produced a powerful underwater shock wave which visibly shook Razorback and her crew.