The Orca is an autonomous underwater vehicle (AUV) being developed by Boeing and Huntington Ingalls Industries (HII) for the United States Navy. It's designed to be modular and can perform anti-submarine warfare, anti-surface warfare, mine warfare, electronic warfare, strike missions, minesweeping, intelligence, surveillance, and reconnaissance. It's powered by a hybrid diesel/lithium-ion battery system and is capable of performing autonomous operations on missions that can last several months.