 The Phase 1 ACV will be 200 modified versions of an existing U.S. or foreign armored vehicle to enter service around 2020.It will have limited amphibious capabilities to cross rivers and coastal inlets and be carried on a landing craft miles from shore, which will deploy it from the shoreline to swim the rest of the way.Seaborne requirements are likely for operation in sea state 3, against modest winds and -high waves, taking about one hour.