On the yacht I work on I have set off the alarms, twice. I was sitting directly under it. As far as stealth vaping or smoking goes, my last boss of 14 years NEVER knew I smoked! The present new boss will never know I vape either. However, my hubby, the Captain chews nicorette gum all the time in front of him. I also chew the gum when out to lunch or dinner with the boss. It hardly seems fair, because after all it is just the way we are getting the nicotine, but the perception of vaping is that, it is smoking, and therefore is not acceptable. I just don't want to press the issue and have him tell me I can't vape IN the boat. Which I do all the time. And would do it even if he told me not to. I am such a rebel. I have turned other yachties onto vaping and they are so thankful of not having to go out on the dock to smoke. It is just the nic we are after, who cares anymore about ciggies?, when there is vaping?