A new captain card that was from the Drive Thru Review Season 5 Kickstarter campaign
Text says:
Reveal the top boat card at the start of the Launch Boats Phase. If it is a $2 boat card, add it to Captain Mouse's fleet. If not, discard it.
During the auction phase, if the first card drawn is not a $2 boat card, draw one more. Captain Mouse will bid when you draw a $2 boat card.