In the first scene of Binghamton aboard the "73", his left shirt collar is tucked under a binocular case strap in the wide shots but is untucked in the closeups.
At 8:14 when Binghamton is looking through the binoculars, he says "pow!". The binoculars are in his left hand. When he says "torpedo two was right on target", his hands are empty. The binoculars are hanging in front of him.