U.S. Secretary of Defense Robert Gates chose the Navy League convention to spell out some hard truths about future funding. After paying tribute to the thousands of sailors and marines deployed on combat operations in the Gulf, Iraq and Afghanistan, Gates noted that the Navy has been the most vocal of the U.S. armed services in protecting its force size.
Here is a scenario produced by Northrop Grumman that demonstrates the thinking behind the Navy-UCAS program:
Underwater Projects Group (UPG), part of the Singapore-based faculty of the University of Illinois at Urbana-Champaign, is developing an airdrop-capable underwater vehicle. The Trident Mk1 is said to be modular, allowing several kinds of payload to be accommodated. Either thrusters or water jets, both vectoring, power it.