noun
mother ship; depot ship
A large vessel that serves as a base for smaller craft, providing supplies, repairs, or coordination. Used in naval, fishing, and space contexts.
母船は漁船団に燃料と食料を補給する。
The mother ship supplies fuel and food to the fishing fleet.
宇宙探査機は母船から切り離された。
The space probe was detached from the mother ship.