From the United States Marine Safety Association Your International Resource for Marine Safety ******************************************************************** TSA Permits CO2 Cylinders
In 2006, the Transportation Security Administration (TSA) in the United States permitted CO2 Cylinders with an inflatable PFD to pass through their security checkpoints, only to reverse that decision roughly 45 days later when the liquids and gels terrorist plot broke open.
Effective August 4, 2007, the TSA again permits the CO2 cylinders with an Inflatable PFD through their security checkpoints. The permission process this time went through the White House and Congress. It is expected that this approval will stay in place much longer due to a much broader approval process. TSA Screeners across the United States have been trained already and are prepared to let these through. Look under "Disabling Chemicals & Other Dangerous Items" for specifics: http://tinyurl.com/ptxdw
Remember though, it is still each airlines choice whether to allow these on their airplanes and each sets their own policies (roughly 1/2 allow them and 1/2 don't). Check with your airline (and connecting or return flights) or their websites to make sure they allow them before you travel.
