Both 320mm & 1-80

Latest Edition: 14 Ed

Authoritative

Quick Install: Installs in minutes with included hardware

Last Correction: 2-Oct-2019

GPS Backup with a Plastic Sextant Lake Erie Both 320mm & 1-80by David Burch No power, and batteries used up? This book and a Mark 3 sextant lets you carry on. For those who choose not to invest the time and money to learn the full range of celestial navigation, this booklet and a Mark 3 sextant provide a minimum backup kit that can be used to navigate across any ocean. This book provides a means of learning and executing a position fix at sea when a vessel has run out of power and all the batteries have been