[sea enemy]

From the book Wahoo by R.H. O'Kane:
"Two more fish were on their way to hit amidships and under her bow, all in an elapsed of 15 seconds.
Buckley reported, "All hot, straight and normal," but I could see the faint, blue smoke of our last torpedo
heading towards, not leading the enemy. They would all miss astern. We fired another torpedo with the destroyer's
speed on the TDC increased to 18 knots, but now alerted, she turned away just in time..."

They had the same problems in the real thing, too....Missing a DD at point blank range because of a 5 knot speed TDC entry error.