The next day, she launched three torpedoes at another ship with no results.

Both sides launched torpedoes and opened fire at about 23:00.

Between 2310 and 2319 they launched 28 torpedoes at the Allies.

She launched two torpedoes at each target, but all missed.

She launched four torpedoes while surfaced and hit with two.

At 0032 on 21 December, she launched three torpedoes for two hits.

The next day, she again contacted the same ship and launched four torpedoes at her.

Picking out two targets, she launched three torpedoes at each.

At 01:40, she launched three torpedoes and then another two in rapid succession.

She launched four torpedoes at the lead ship before losing firing position.