Net cutter (fisheries patrol)

Net cutters, or trawlwire cutters, are secret weapons that were employed by the Icelandic Coast Guard during the latter two Cod Wars to cut the trawling wires of foreign fishing trawlers working within the then newly claimed Exclusive Fisheries zones. They were invented by Commander Pétur Sigurðsson, Director of the Coast Guard, with assistance from Friðrik Teitsson from the Icelandic lighthouse institution and Tómas Sigurðsson, who were both ironmongers.

Source: Wikipedia — Net cutter (fisheries patrol) (CC BY-SA 4.0)