Originally Posted by cabo_sailor
I believe you will need a bit more than that to calculate leeway. For myself I would use a good compass
and a GPS. Steer a magnetic course and plot on a paper chart where you should be in say an hour on that course. Next, get your GPS position and plot it. The difference can be measured on the chart. This takes into account not only wind but currents also.
The detailed method can be found either in a decent nav book or do a web search for "set and drift".
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Thank you for that advice. I will read about set and drift. I had planned to plot fixes and estimated positions as I went along to each waypoint, doing my best guess. The tidal stream info I expect will be accurate enough, but then the leeway. My boat is light and really catches the wind, so I expect it will need me to make a wide allowance, and also I will be travelling slowly, so the effect will be even greater. But my radio
has GPS, and also stores input waypoints and nav info to them, SOG and COG and bearing, so I was going to plot the GPS readings on the chart, too.
I have been trying the hand-held anenometer. It gives wind speed in mph, both the average and highest, and also gives the wind on the beaufort
scale graphically, and I think this will help a lot.
Of course, it all needs experience, and I don't have that yet, so I'll do a bit of trial and error to guage job.
I'm glad I am thinking along the same lines as you with plotting and using the GPS as regards leeway. I will always plot on a paper chart as I go along. If the GPS went down, or some human error which I trusted to, it would be a very different game
. So dangerous. I don't really like the sea. I'm scared of it, I suppose, in all truth. I don't like anything dangerous. I'm not an adrenaline junkie. I think it is a challenge that I really need to accomplish, to sail and navigate competently and safely. I nearly drowned once in the sea. I got tired and just knew I didn't have it in me to get to shore. But fortunately I had a snorkel so I could float and take a breather. So I have a lot of respect for water