bomb load of general purpose iron bombs and depth bombs. The difficulty of fitting bombs to a flying boat was solved in an ingenious but highly effective manner. Tracks were fitted into the underside of the wings inboard from the two inner engines. Dollies could be winched out on these tracks through hatches in the fuselage sides. This allowed up to eight bombs, or depth bombs, four on each side to be positioned for an attack on surface or submarine targets but with the dollies to be normally inside the hull on patrol, avoiding the drag of bombs and carriers. It was also possible to carry a selection of different types of bomb inside the aircraft and arm the dollies according to target requirements. As WWII progressed, the Sunderland was equipped with radar and powerful searchlights to locate targets at sea, and fixed forward firing machine guns were fitted in the hull to suppress anti-aircraft fire during an attack run. The Sunderland served in all theatres and was highly effective in a wide range of roles, becoming a 'maid-of-all-work', carrying troops, casualties and covert operations personnel. Sunderlands carried mail and supplies, often operating into areas were no landing strips were available for land planes, and into areas where parachuting personnel and materials was not desirable. As a submarine hunter killer, the Sunderland was most effective and greatly feared. The author logged flights on over seventy Sunderlands, largely air tests of machines delivered from the factories in Belfast and Windermere. This