Very scarce book, first edition 1924. This copy is poor externally but fair internally. Red cloth hard covers which are worn and stained, the spine is sunned and is torn at the top and base. There are old sellotape marks on the pastedowns, the first free endpaper has notes and calculations, the rear pastedown has pencil notes. Binding is cracked at the title page. There is an old sellotape repair on pp 61-62 which has turned brown with age. Occasional pencil calculations or ticks in the margins. Containing all the work for Second Mates and also much common to all Grades. Covers examination syllabus including the following: Logarithms, Day's Work, Mercator Sailing, Parallel Sailing, Amplitude, Time Azimuth, Chronometers, Plane Trigonometry, Chart Work, Reduction to Soundings and Astronomical Definitions.