Manual TDC multiple Targets?

[zero2005]

So, finally found a sweet lookin convoy, 10 may 1943, and only 1 escort.

i have their approx speed of 5-6 knots, and they're about 18nm away. im set up on a course to intercept and get a good side shot. i have a full load of 6 mk23's in the front tubes.

and while im pretty good at hittin a single target out to about 2000y using the fast-90 method, the mk14's have been hamperin my kills. so, first off, how are the mk23's? i know its before the mk14 fixes so did the mk23's suffer the same problems that the mk14's did?

oh and, using the fast-90, how can i target multiple targets and get somewhat simultaneous hits? its a 2 column convoy. i cant use the speed fast/slow method like on a mk14 because the mk23's only have the fast method.

also, since once i fire i know the DD is gunna head my way, i grabbed a couple of those mk27 Cutie torps, how are those? the 95 lbs of explosive should at least annoy the DD right? lol