A backup is a single file holding everything on your boat: the log, to-dos, engines, custom properties, files and photos. Restore it to put your boat back as it was.
iPhone: tap your boat’s picture at the top left, tap •••, then Export Data….
iPad: open the tab with your boat’s name, tap •••, then Export Data….
Mac: choose File ▸ Export Data…
Then choose where to save it.
A zip file named after your boat, like Tern.zip, that opens anywhere:
Still stuck? Hail us.