It's good to talk with you again. But course and speed readings every 10 to 15 minutes doesn't give a single-hander much sleep.
From what I understand about windvanes, as the weather
backs, the boat backs with it. When the single-hander wakes from his sleep, he will look at his compass
and know his heading. But how will he know how much time he sailed on each intermediate course in order to figure his current
location? Or is he forced to assume a constant boat speed and constant wind/course change and calculate a big arc
on the chart until he is able to make a sighting?
Are there any other options, short of using electronics
, that cruisers can use to estimate a course when they get out of the bunk? How have cruisers typically handled this situation before GPS