CCGS Captain Molly Kool is a Canadian Coast Guard converted medium class icebreaker.

[2][6] CCGS Captain Molly Kool has four medium-speed diesel engines geared to two controllable pitch propellers in nozzles.

In 2016, Chantier Davie Canada began offering Vidar Viking and her sister ships as a replacement to the ageing Canadian Coast Guard icebreakers under the moniker Project Resolute.

[20] On 10 August 2018, Viking Supply Ships announced the sale of its three vessels to Her Majesty the Queen in Right of Canada for a profit of $274 million.

Some of the modifications the Coast Guard plans for the vessel, and her sister ships, were deferred, so that she could be employed ice-breaking in the St Lawrence estuary during the winter of 2019.

Having grown up spending her summers sailing with her father in waters in and around the Bay of Fundy, Molly learned about life at sea and became an accomplished sailor.

[6] On 22 March 2019, Captain Molly Kool and CCGS Louis S. St-Laurent were dispatched to aid the tanker Jana Desgagnes which had damaged a rudder in heavy ice 16 nautical miles (30 km; 18 mi) southwest of Port-aux-Basques, Newfoundland.

Captain Molly Kool towed the vessel further out to sea to await the arrival of a tugboat, which would take the tanker to Sydney, Nova Scotia for repairs.

[27] During the operation, Captain Molly Kool used her towing notch, a feature not present in other CCG icebreakers currently in service, to escort the stricken tanker through the ice.