In the thread about the USCG proposing a new federal law requiring ID
while boating we are talking about what the USCG is looking for, but
currently many, maybe most, states require you to carry ID.

In Georgia, you need the same type of ID to boat as you do to drive.

The boat registration and a government issued ID (drivers license,
passport, a boat safety certificate, ID card etc.) I keep my
registration, an extra copy of my drivers license, and a spare key in
the boat at all times, so I know I will never forget them it. I use one
of those fake cans to hold all items.

What is requirement in your state, and do you always keep them with you
while boating?