To get your boater card, you first need to show proof of education/pass exam, such as shown in this video.
California's website to download the guide or request exam: dbw.parks.ca.g...
AFTER you get the certificate back from passing the exam, you can visit the CA website and pay the $10 to get your boater ID: boatercard.par...
Exam A: 1:51
Exam B: 14:10
Checklist for every trip: 22:51