Comment by ianburrell

There isn't a date but clues indicate that the crossing was decade or more ago. The Garmin 12XL was released in 1996. It is possible that was using GPS and none of the equipment available now, but more likely that didn't exist.

Solar panels weren't as available back then. Satellite messengers weren't available. Both are popular with sailors now.

Edit: It mentions other GPS units so could be more recent.