Daboll's practical navigation

being a concise, easy, and comprehensive system of navigation ; calculated for the daily use of seamen, and also for an assistant to the teacher ; containing plane, traverse, parallel, middle latitude, and Mercator's sailing ; with all the necessary tables. Concise rules are given, with a variety of examples in every part of common navigation ; also, a new scientific, and very short method of correcting the dead reckoning ; with rules for keeping a complete reckoning at sea, applied to practice, and exemplified in three separate journals, in which may be seen all the varieties which can probably happen in a ship's reckoning