Speedy motor torpedo boats of Britain’s “mosquito patrol” carry a triple threat against enemy attackers coming by sea or air. Looking skyward from the bridge, a brace of multiple anti-aircraft machine guns has been added to the diminutive fighting ships to challenge bombers and air raiders preying on sea-borne shipping and coast defenses. Other arms include the usual torpedo tubes for use against surface craft as well as submarines within range, and depth charges to deal with sub- marines lurking below the surface. A large fleet of these well-armed racing boats has been completed for coastal duty.