Daboll's practical navigator: : 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.