If the boat owner (or somebody they know) has a Captain's License and is willing to operate the boat, they can include "Captained Pricing" in their listing! To see if you (or someone else) qualifies as a captain, check out the USCG definition of Captain. To offer a captained package through Boatsetter, a USCG certified captain must be the operator of the vessel.
To add "Captained Pricing" to your listing, click My Boats > Manage > Pricing (pictured below).
From there scroll down to the checkbox labeled "Captained Pricing". You can then add the full day price, half day price, weekly price and "Fuel Policy" for your captained vessel (pictured below).