Blue cloth hard covers with gilt titles on the front and the spine. Book is in Fine condition and appears unused. Includes the pamphlet Supplement No 1, 1977, corrected to 2nd May 1977. Also includes a separate dark blue slipcase containing seven charts and a sheet entitled 'Logarithmic Speed, Time and Distance Scale'. Both this and the book are housed in a blue thick card slipcase which has some discolouration around the margins, and some surface damage on one side. The text consists of Part I - Power vessel routes; and Part II Sailing vessel routes, for use in planning deep-sea voyages or passages. It covers maritime meteorology, climate, weather, currents, routes. The charts are: World climatic chart - January; World climatic chart - July; World main ocean routes for power vessels; World sailing ships routes; Tracks followed by sailing and auxiliary powered vessels; World surface currents; Load line rules, zones, areas, and seasonal periods.