Continuity mistake: Acting Lieutenant Hornblower is confined to the "hole", a slimy, rat-infested cell where he can neither lie down nor stand. He is confined long enough for Hunter's leg wound to heal sufficiently to regain his mobility, yet, when he emerges, he is clean-shaven.
Continuity mistake: When the Spanish demand Hornblower surrender his ship, the battleship fires two shots.the first shatters the topsail spar at the jeers, bringing it down, and the second.shatters the once again undamaged topsail spar outboard of the jeers, bringing it down again.