rekamark (ON) noun

‘Drift boundary’. Iceland is surrounded by ocean currents (Gulf stream, Polar stream) so the rights to gather driftwood and other things washed ashore was important and strictly regulated in the laws. The landowners had parts in the shore and had the right to collect anything that drifted ashore on his part of the shore and off of the coast out to an imaginative ‘boundary’ (rekamark) in the sea. He also had the right to all catch, with certain limitations, within another restricted area with a defined boundary (netlag).

drift boundary OIce Jó Llb 60, 61 Refs:

CV s.v. reki; KLNM s.v. reki