I was just talking with a sail boat delivery captain and asked about traveling with a deck vest that has a CO2 cartridge.
Traveling with your Life Jacket? TSA Guidelines – US Sailing
https://www.ussailing.org/education/adult/safety-at-sea-resources/traveling-with-your-lifejacket-tsa-guidelines/
Had me concerned. He said it's not a problem any more. He does it all the time.
