I do it in my Head (US Navy Taught)
1-The Fluckey/OKane/Morton Method..Discover Merchants-Put them at 090Rel to get ahead, constantly adjusting course to keep them @090 Rel. If Theres an escort on the Flank I keep him @ 100Rel
2-When the Merchant Column closest to the flanking escort has a zero angle on the Bow, slow, dive and put that merchant column at 090 rel and now slow speed dive to PD, silent running start ranging and Track the closing rate, this will give you @ speed.
3-Pick your targets from the 2nd or third row. You want Targets with a Narrow AOB-@25-35 as this will put you @ 1500meters off their Track. Adjust speed (never stopping) to keep AOB @ 20-25deg, keep ranging, checking speed.
4-When @10-20 REL Keep the scope fixed and shoot 2-3 torpedos. If its a Long ship I put 3: 1 First Mast, 2-MOT, 3 aft mast. Almost a Guaranteed Kill.
5-Dont gawk, swing the scope aft, and there should be one of the two out column ships crossing for a stern shot...Check AOB, crosshair on Bow(Dont move it) and LOS tube V MOT.
Or try something else.
