This is the 8978th most frequent Japanese word.
沈船
Sunken ship.
Here, 沈船 refers to a ship that has sunken and is lying underwater.
沈船は海底に眠っている。
The sunken ship lies on the ocean floor.
In this sentence, 沈船 specifically describes the object of exploration by divers.
ダイバーたちは沈船を探索している。
Divers are exploring the sunken ship.
沈船 is used as the target of a salvaging operation.