A new amphibian vehicle, Landing Vehicle Assault (LVA), is under development to replace the current Marine Corps LVTP-7. Contracts with Bell Aerospace, FMC Corporation, and Pacific Car and Foundry Company have provided conceptual designs. These include planing/track and air cushion vehicle (ACV)/track hybrids. LVA will carry 25 to 34 troops at high speeds over-water (25 to 40 mph) and over-land (40 to 55 mph).Included in the development is a 1500 horsepower stratified-charge rotary combustion engine. Other hardware developments include experimental full-scale planing and ACV hydrodynamic vehicles and a lightweight aluminum track.