I now make it a practice to log all my trips using the
"track log" feature of the Garmin handheld GPS receiver,
and after each trip I upload the log data.
I've written a program to plot this data on NOAA chart
images.
This collection is mostly from sailboat racing I did
in the late 1990s and early 2000s, most of which are
Wednesday afternoon races from Shilshole Marina.