Each fathom line, conservation area, and marine reserve is defined by a connecting series of waypoints (latitude and longitude). The waypoints are used for regulatory enforcement, while the maps below of fathom lines are provided for visual reference. Each link is a one-page pdf file unless noted otherwise.
Consult current regulations to determine which fathom line is in effect during your fishing activity.
Depth-based area closures are used to control impacts to Pacific halibut and to overfished species in the sport groundfish fishery. For example, restricitng the groundfish fishery to shallow waters is effective in reducing impacts to yelloweye rockfish, which tend to be found deeper than a targeted species like black rockfish.