## Description and Use of a Diagram of Navigation: By which All Problems in Plane, Traverse, Parallel, Middle Latitude and Mercator's Sailing May be Instantly and Accurately Resolved. Adapted to the Capacity of All who Know the Use of Figures. Designed as an Easy Introduction, by Sensible Demonstration, to the Principles, and the Practice of Navigation. With a Diagram Engraved |

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arc or angle breadth called centre chord circle circumference co-sine column considered corrected counted course 3 points course and distance curve line departure Diagram of Navigation difference of latitude difference of longitude direct course dist distance sailed divided ence equal equator Example expanded extremity figure find the COURSE formed give the course give the diff give the distance Given greater half Hence hour hypothenuse index set index to meet inspection intersection length less Mercator's sailing meridian distance meridional difference middle lat middle latitude miles moon nearest oblique observation opposite parallel places plane sailing points proper diff quarter radius ratio reckoning represents required the course right-angled plane triangle Rule sails east secant Set the index ship in lat sine solutions taken tance tangent tenths tides trace traverse true tude