Readers of this book will gain a clear appreciation of the growing importance of the aircraft carrier during World War Two and proposals thereafter for the future composition of Royal Navy's surface fleet together with the nature of the Fleet Air Arm's expansion programmes. This second book of three focuses on the Fleet Air Arm during the middle years of the Second World War. It covers the transitional period moving from a small number of carriers to a naval air arm with modern aircraft types capable of operating a number of Fleet Carriers in the Pacific Ocean following Japan's entry into the War in December 1941. The struggle in the Mediterranean continued and reached its peak with the efforts to relieve the siege of Malta in the summer of 1942 and the subsequent landings in North Africa and Italy. The increasing role played by the Fleet Air Arm aircraft operating from Escort Carriers and Merchant Aircraft Carriers in the Battle of the Atlantic during 1943 is also apparent. The aim of these volumes is to present an insight into the major planning and policy issues of concern to the Admiralty and extensive coverage of naval air operations. Difficulties of operating aircraft at sea, the nature of air combat and the complexities involved in expanding an organisation such as the Fleet Air Arm under wartime conditions are discussed.