Mike Slinn



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Practical Sailor

MarNav – Open Source Software

marnav-discuss

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I’ve just returned home after 8 weeks on board my sailboat. Half of that time was spent preparing for a trip from Vancouver to the north end of Vancouver Island; the other half was spent en route. I spent quite a bit of time testing products for various upcoming Practical Sailor reviews. [...]

NOAA generates weather forecasts and provides them in text format, via VHF, weatherfax and GRIB data. The coastal forecasts are created by regional supercomputers running weather forecast models, and the resulting forecasts are adjusted by experienced meteorological staff. Mariners who are planning long passages should learn to interpret the weather forecasts themselves, particularly if [...]

This is my favorite feature of all the products I reviewed for the navigation software survey I wrote for Practical Sailor Magazine and Power Boat Reports.
GRIB weather data is provided free of charge by NOAA. Newer navigation products can display GRIB weather data such as pressure isobars and temperature, as well as sea state. Coastal [...]