downrigger

[ doun-rig-er ]
/ ˈdaʊnˌrɪg ər /

noun

a fishing line used in trolling that is attached to a weighted cable in order to put lures or bait at a specific depth under a boat, usually near the floor.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019