Whether you can take a sea scooter on a plane depends on a few things:  the scooter must meet carry-on size requirements and the battery type of your particular scooter. According to Yamaha sea scooters, the kind of battery in your diver — lithium-ion or lead-acid — is most important, but always review the specs of the scooter you’re considering to see if it was designed to be airline-compliant. You can always check it!