Three separate pencil sketches of trawlers above a wash study of five at sea in starboard-bow view. All are minesweeping trawlers in the 1915-18 period. They are all of a similar type with a flush deck or very small forecastle (no forward well deck) and funnel abaft the wheelhouse. The variations in rig suggest that they are commercial vessels hired into wartime service rather than naval-built vessels of the 'Military', 'Strath', 'Mersey' and 'Castle' classes.