 She was to arrive on 6 December but was delayed due to bad weather and the presence of a minefield.She arrived at the estuary a day late, surfacing from the mouth of the river.The aim of the operation was for several canoes of marines to paddle 60 miles up the Gironde to attack German ships in Bordeaux; in the process of disembarking the canoes, one of the six canoes was damaged, leaving the submarine to return those marines while the remainder continued the assault.