The Navy has awarded LockMart a contract to demonstrate the release
of Mk-54 torpedoes from high altitudes and long standoff ranges. See:

http://www.spacewar.com/reports/Navy...apability.html

The article mentions the possible future use of Mk-54 against surface
targets with this system, but would the Mk-54 (which has the Mk-46's
96lb warhead, and no under-the-keel detonation capability) really be
useful in that role?

Or is the Navy really worried about Sub-launched SAM's?