Baited lines
(Courtesy of Scottish Executive)
2.14 Bottom set and drifting lines (long lines) are ropes, up to several kilometres in length, carrying a large number of baited hooks on branch lines, which are supported in the water column at the required depth by buoys.
Given the length of the lines the attendant buoys may not be visible over a large proportion of the submerged line and where a buoy is visible the surface mariner may be unable to determine if the buoy is connected to a line of pots or a baited long line.
Figure 14 Baited Lines