Do what I do
either sink em all from outside five thousand yds,
or show your tower above surface to draw the destroyers
onto steady CBDR track and albeit converging on you its steady
and stable situation for long enough so Sink em all, dine on the
convoy at leisure.
more realistically try this,
send off one long range shot into the whole overlapping formation
set it shallow enough to hit anything and launch at extreme long
range fire on the formation at a point about twenty five percent
of its length back from the nose.
as its closing the formation on slow speed move further down
along the the targets track away from the convoy in the same
direction they are close the track if necessary as the torp starts
to close the formation turn your sub into final firing orientation
and hit all stop dont hit silent running your still loading just all stop
in all likely hood your still seven thousand or six thousand yards
out the convoy will gather but the destroyers will break up a
bit and stay fixated for a bit and regathering will have the
convoy on you before they are re screened most versions
the destroyers wont search outside a four thousand yard
circle unless theyve seen you torpedo trails or not, seriously.
M