The Gantocks is a small group of rocks lying off Dunoon in the upper Firth of Clyde, West of Scotland.

A navigation beacon was constructed on the rocks circa 1886.

[1][2] The MV Akka was lost, after grounding on the Gantocks on 9 April 1956.

[3] The PS Waverley grounded on the rocks on 15 July 1977, with 715 passengers on board.

[4][5] The Gantocks beacon was repainted and maintenance carried out during 2018.