Her second patrol, between 19 August and 12 September 1941, lasted 25 days.

The patrol lasted an hour and ten minutes.

The patrol lasted an hour and a half.

The patrol lasted 335 days (11 months) during which the submarine sailed 38,800nm.

These frequent patrols lasted for a period of 6 weeks and were used more effectively in 1916.

A normal patrol for these boats would last a maximum of 12 hours.

The patrols lasted between 01:00 hours to dawn on 11 February.

These patrols over the Bay usually lasted nine and a half hours.

The entire patrol lasted less than an hour.

The patrol lasted 27 days, the longest of her career.