'LN' was the designation of Allied convoys (together with a numerical suffix) plying the route from the St Lawrence river to Labrador, Canada, and as such reciprocals of the 'NL' series (summer 1942/winter 1944).

An early example of the series was LN.4 of 25 June 1942 from Quebec to Labrador with unspecified ships, and a late example was LN.30 of 26 October/1 November 1944 from Quebec to Labrador with the 2,404-ton British Eglinton Park.