CCGS Limnos[a] is a Canadian Coast Guard coastal research and survey vessel and it is named after the Greek island of Limnos which itself derived from "limni", the Greek word for lake.

The ship is powered by two Caterpillar C18 geared diesel engines rated at 714 kW (957 hp) which drive two L-drive azimuth thrusters.

The ship is equipped with Sperry Marine Bridgemaster E radar operating on the E and X bands.

[1] Limnos was assigned to Canada Centre for Inland Waters at Burlington, Ontario.

[3] Limnos has served on joint missions on the Great Lakes with vessels from the United States Environmental Protection Agency.