Sunken or otherwise rejected watercraft or any part of it or its content.
Wreck is a non-sailable often broken relic of a ship, boat, dug out or other watercraft. The term can be used also to refer for wrecked goods.  The most common wrecks in a maritime context are shipwrecks.
Wrweck of Kallonlahti, Pori, Finland. Photo: Riikka Tevali.