The Royal Navy first extended a carrier's horizon by putting visual lookouts in aircraft such as the Blackburn Blackburn or Avro Bison, though cloud could still hide an approaching force. Wartime crews then experimented with adapting air-to-surface radar in aircraft such as the Fairey Swordfish, even before suitable plan-position displays made the warning picture easy to interpret. Modern sensors carried above the sea surface see beyond shipboard radar limits and give fighter controllers more time to organize an interception. The E-2 Hawkeye offers the stronger dedicated fixed-wing capability, while Crowsnest gives a short-takeoff carrier a useful helicopter-based alternative when it cannot operate a Hawkeye-sized aircraft. The comparison makes the operational point that an imperfect airborne sensor is still far better than leaving the task group without an elevated warning layer.
Notable Point · 2:08:30-2:14:20
Airborne early warning expands the carrier's sensor horizon
The Hawkeye and helicopter-based Crowsnest illustrate how airborne early warning extends a carrier group's radar horizon even when ship and deck design limit the aircraft available.