call-logger,
Looks great, but not entirely sure I'm up to the coding. Last time I tried seriously to do any coding was on a ZX81. Needless to say I've forgotten most of what I knew. Secondary port tidal height calculations, International Rules for the Prevention of Collision at Sea, or a course to steer to allow for tidal set and drift and leeway, and I'm your man, but coding!?
Thanks for the offer, but I'll stick with my low-tech approach for now at least.
Are you short, long, or just monitoring, call-logger?
All the best