Late in 1944, the British Pacific Fleet (BPF) used the high-altitude performance of its Supermarine Seafires (the naval version of the Spitfire) on combat air patrol duties. Seafires were involved in countering the "kamikaze" attacks during the Iwo Jima landings and beyond. The Seafires' best day was 15 August 1945, shooting down eight attacking aircraft with a single loss.