Downrigger means a piece of equipment attached to a vessel and with a weight on a cable that is in turn attached to hook-and-line gear to maintain lures or bait at depth while trolling. The downrigger has a release system to retrieve the weight by rod and reel or by manual, electric, or hydraulic winch after a fish strike on the hook-and-line gear.
50 CFR § 635.2
In addition to the definitions in the Magnuson-Stevens Act, ATCA, and 600.10 of this chapter, the terms used in this part have following meanings. If applicable, the terms used in this part supercede those used in 600.10: