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Thanks, All. Let me re-phrase: The chart-plotters I use regularly (TimeZero and openCPN) don't lend themselves to navigating by compass or sextant if the GPS network (or my GPS equipment) goes down. I would still have access to my electronic charts, and would like an app that makes it easy to...

One of these days the GPS system will go down. Does anyone know of a "manual" chart plotter that doesn't rely on GPS? By this I mean software that uses (free) NOAA charts and has tools to simply compass-based piloting and ded reconing? If not, what features would you want to see in such a...

Greetings, All -- My wife and I live on board the Endeavour, our 72' old steel former US Army boat. We are over-wintering in Petersburg, Alaska. For the 2021 summer season, May through October, we will be operating in Southeast Alaska and the Aleutian Islands. We have a site and a blog. You...