[sublynx]

Lt.z.s. Theodor Wald
U-331, VIIC
1. Flottille, Kiel

13.4.1941
BB9673 SO 15, sea 7, cloudy, vis. medium.
1515 spotted by the port escort of the convoy we've been shadowing. Had to dive. A submerged speed burst, then 1/3 ahead, then 70 RPM silent running towards the convoy's estimated direction.
1558 Followed an unknown contact in the hydrophone for a period of 2 minutes and 20 seconds until it's relative bearing had changed by three degrees and then for 2 minutes and 30 seconds until the relative bearing had changed by another 3 degrees. Estimated course 71.
1605 Turning to 341 true bearing for a long range submerged launch.
1608 Up periscope for 7 seconds. Quick glance at the convoy, distance should be ok and course estimation close. Preset TDC. 349 bearing, gyro angle 0, range 4000 meters, running time 4 minutes 6 seconds, speed 6 knots. The two destroyers that tried to find us have returned to the convoy.
1612 Up periscope for 5 seconds. A Tribal at 350.
1620 Up periscope for 8 seconds. A 1800 BRT merchant, range 2500 - 3000 meters. Preset TDC 3000 meters, 3 minutes 7 seconds.
1621 Two G7e's launched at a 14 second interval.
1622 Two G7e's lauched at an 18 second interval. Target 2000 BRT merchant, range not estimated in the heavy seas. LF away from the convoy's direction and diving.
1625 An explosion heard 4 minutes and 30 seconds after the launch of the first torpedo. KF ahead.
1629 An explosion heard after 8 minutes 50 seconds after the launch of the first torpedo. Possibly a sinking ship.
1630 A+20, 100 RPM, course 271. No destroyers heard getting closer.
1633 course 226, away from the closest escort.
1634 More explosions heard. Now certain that something was sunk in the attack.
1636 We are between the convoy and a destroyer. The destroyer probably is trying to locate us. 70 RPM.
1638 Judging by the hydrophone sounds, there might be two merchants that can't keep up with the convoy.
1655 To periscope depth.
1716 Two - three stragglers sighted. Warships still audible in hydrophone and unidentified ships still visible. Preparing for reloading and pursuit of the stragglers.
1758 Torpedoes reloaded. A merchant and a corvette visible.
1800 Surfaced. LF ahead.
1913 Three stragglers sighted.
1924 GF ahead. The sun has set.
1940 A Frigate sighted in front of the stragglers. PD.
1946 Surfaced. Heading for the last straggler.
2004 Two torpedoes launched, estimated range 1445 meters, speed 2 knots, AOB 90 stb. One miss, one hit.
2011 2000 BRT merchant sunk.
2014 A Frigate sighted. Speed AK away from the enemy.
2017 PD.
2022 A flare in the sky. 70 RPM, 1 knot, frigate 177 rb.
2045 A Black Swan 1800 meters, 190 rb. Uses flares and search lights.
2144 Surfaced. The Black Swan 6 - 8 km, rb 75. Saved and Exit.