I just had an awesome convoy attack, nearly perfect.
Got a report of a convoy coming my way. I moved to intercept and was in place, 5km off their port side as they approached. I inched my way forward as they closed so I'd be approx 1km from the close line of ships I'd estimated.
I did make one mistake and as they closed I peeked with my periscope and forgot to lower it
and they actually sent bombers after me! I got hit once and moved. The convoy didn't change course.
The lead escort went past my bow, the edge escort extremely close to my stern, but both passed me as I moved undetected.
I took 4 shots but got greedy! The front row of ships was medium cargos, but a far row had some large troop and tankers! I fired at those. 2 Type IIIs and 2 FATs. One Type 2 exploded early.
The other hit a troop ship. The FATs just went off on their merry way and were never heard of again.
After launching I sped up to 2kts, dropped to 40m and inched INTO the convoy. After I heard the first row of ships pass amazingly close over head I turned starboard and headed out of the rear of the convoy. There was some depth charging and pinging, but nothing near me.
As I exited the convoy I popped up to periscope depth and shot a homing torpedo at a passing ammunition ship. Hit!
The escorts never knew where I was. Only sunk two ships (5.7K troop and 7K ammo) but misses aside, I feel it was a picture perfect attack.