I've been cruising around the NW Approaches off the West coast of Scotland looking for ships to use the last of my torpedoes before heading back to Wilhelmshaven to end the current patrol. I just got attacked by an Avro Anson well outside the 300 km radius of the nearest airbase and he came in from further out to sea from the west. I've noticed that some of the airbases on the map when moused over, bring up a small aircraft icon a fair distance from the airbase and "368 Nm" between the aircraft icon and the airbase. Do airbases displaying this when moused over have aircraft that have a larger combat radius than the usual 300 Km? Or are there Anson's being launched from a Carrier that may be lurking in the vicinity?