I thought I saw a more relevant thread for my question but I can't find it now, apologies this doesn't answer your question (whatever your question is, I did find out earlier this year what an "app" is, but I don't know what all the other gizmo words mean
Anyway, TIDE, I don't use electronics (and if yours aren't working you won't be using them either
) I'm reading Passages South and Mr. Van Sant says that high tide near the open ocean is at 8:00 local time on the day of the full moon, and after that add 52 minutes each day for the next high tide. Is that true? Just how "near the open ocean" is near the open ocean? Does the leeward side of Caribbean islands count? The Horta marina?