Thanks jaffadog. It looks like it may have potential for my situation. It is not for my boat. My daughter and family will be leaving Hawaii for Glacier Bay, Alaska in about 3 weeks +/-. Depends on the weather window. I'm back on the mainland. Via ham radio I will be in regular contact with her, and also give her the weather forecast by daily email, using winlink. This has worked well in the past. It occurred to me that I might also be able to track her progress by logging her daily nav stats on a chart. I know, some winlink sites do this too. But the above would be my own personal record.
I won't get to it tonight, but plan to study your website tomorrow sometime. Will get back to you when I'm done.