How an Atlantic airfield changes the U-boat war

What effect would an island airfield in the Atlantic gap have on U-boats?

It would be extremely useful, as the Azores demonstrated by extending Allied air coverage into the gap.

Land-based aircraft operating from an island airfield extend surveillance and attack coverage into waters that submarines previously used with less interference. The panel identifies the Azores as the historical answer and stresses how useful the bases became. Longer patrol reach allowed aircraft to find, attack, or force U-boats underwater while they tried to cross the gap. This short exchange points directly to the geographic foundations of convoy protection in the mid-Atlantic.