Dropped for Slowing Down an Ocean Going Ship
Puzzle 5 of Flat Things Easy Pack
Question is: Dropped for Slowing Down an Ocean Going Ship
and the answer is: SEAANCHOR
Word Meaning:
SEA ANCHOR — (nautical) A parachute-like device designed to slow down the speed of a drifting ship or boat and to keep its bow pointing to the wind.
Definitions from Wiktionary.