Airborne Maritime Surveillance Radar: Volume 2, Post-war British ASV Radars 1946-2000 - Hardcoverby Simon Watts (Author) Today, air to surface vessel (ASV) radars, or more generally maritime surveillance radars, are installed on maritime reconnaissance aircraft for long range detection, tracking and classification of surface ships (ASuW Air to Surface Warfare) and for hunting submarines (ASW anti submarine warfare). Such radars were first developed in the UK during WWII as part of the response to the threat to shipping from German U Boats. This