 Complete the following phrase:  HMS Pegasus was an aircraft carrierseaplane carrier bought by the Royal Navy in 1917 during the First World War. She was laid down in 1914 by John Brown  Company of Clydebank, Scotland as for the Great Eastern Railway Company, but construction was suspended by the start of the war. The ship was converted to operate a mix of wheeled aircraft from her forward flying-off deck and floatplanes that were lowered into the water. Pegasus spent the last year of the war supporting the Grand Fleet in the North Sea, but saw no combat. She spent most of 1919 and 1920 supporting 