View the log book — a spreadsheet including put-in/take-out locations, mileage, weather coditions, etc. (the spreadsheet will open in a web page. You do not need spreadsheet software).
I've deleted the Elapsed Time column as stopping to make photographs more than to eat lunch and stretch legs, really made the elapsed time deceiving.
We travelled at speeds from 2.5 kn against wind and tide to 6.5 kn with following winds and seas.
.86 hr/mi = 1 kn
I've added second Distance column as the charted route and the GPS tracking differed.
1.15 mi = 1 nautical mile