Hi folks.
Knut, I understood your rationale OK until your point about "Dead reckoning with the side-drift, currents etc. is much more of an unknown in such a small sailboat than in a powerboat. Especially if beating against the wind in areas requiring frequent tacking".
This caught my eye as I initially thought you might have the cart in front of the horse in your navigation aids and their priorities, when I read your initial messages... No offense intended please.
My only thought here is to encourage you and other friends that you SHOULD be able to determine set and drift if you are in an area susceptible to fog that has currents, tides. etc..
In our electronic world, radar would be a fine tool in the fog for running fixes and distance to hazards but how many of us will be mounting radar on our small craft?
In leiu of that, I encourage all to take a class, buy a copy of Duttons etc. etc. so that you can do the math in your head and determine set and drift. We should know the currents and we should know the tides and variances (if sailing in potentially hazardous waters or waters that can become so quickly) so that we can refer to our notes, charts, compasses, GPS's and know that we have to steer a course of 165 to actually head on a course of 180 (for example).
your choice of a Silva hand-held compass sounds great too. Great for shooting rough bearings and establishing running fixes.
Thanks!