Who had the weaker grasp of what a navy needed to invade Britain: Bonaparte or Hitler?
Short answerHitler. Napoleon at least sought to unite fleets for a fight over Channel control, whereas Sea Lion followed crippling destroyer losses.
NotesNapoleon's plan was difficult but strategically intelligible because it depended on assembling enough naval force to fight for Channel access. Sea Lion followed crippling German destroyer losses and was far less coherent. The contrast is a compact lesson in matching an invasion plan to actual sea control.