A Sea Anchor or a Small Parachute for Planes
Puzzle 16 of Building a House Hard Pack
Question is: A Sea Anchor or a Small Parachute for Planes
and the answer is: DROGUE
Word Meaning:
DROGUE — (whaling) A floating object attached to the end of a harpoon line to slow a whale down and prevent it from diving.
Definitions from Wiktionary.