Convoy in sight, heading straight for me. I have a nice firing plan that will zap a large freighter and a Fiji light cruiser.
At 23:59 I fire 4 tubes.
At 00:00 Convoy changes course from 030 to 360.
One torp hits a passenger freighter (those things don't know how to sink) the other torps miss.
Convoys change course at cardinal times. At midnight for sure. Maybe at sunrise or 0600 and other such times. GRRR.
Something to think about when planning an attack.