Why do planes still have no smoking signs?

While No Smoking signs are certainly there as a constant reminder that smoking is not allowed on board, the signs are also because of convenience and cost. Airlines, like other private businesses, must reinforce federal laws with signage, such as No Smoking signs (via mydoorsign.com).



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In most cases, you will not be able to smoke on a private jet at all. There are a few exceptions, however. If the jet is owner-operated, the owner may allow smoking on board. Additionally, some charter companies allow smoking on certain types of private jets, though this is becoming increasingly rare.

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The bathrooms on airplanes are, of course, fitted with smoke detectors. If someone ignores the rules and decides to light up anyway, the smoke alarm will detect their actions and the flight crew will be alerted.

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Pilots can and sometimes do smoke in the cockpits of business jets. These can be as large as airliners (see BBJ), but usually aren't. Even when a country and/or airline ban smoking in the flight deck, some pilots will ignore the ban and still light up.

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Rules & Regulations
As of 2000, federal law prohibit smoking on all domestic commercial airlines, despite the fact that, by law, commercial airliners must still have an ashtray installed inside of their lavatories.

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You may smoke on a cruise ship, but only in designated smoking areas. On most ships operated by U.S. cruise lines, all indoor public spaces are off-limits with the exceptions being the casino (or part of the casino), a cigar lounge (if the ship has one) and one or two other lounges.

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Do airlines have security cameras on their airplanes? Yes, most airlines do install security cameras onboard their huge airliners. Cameras are installed outside the cockpit, so that the pilots can see who wants to enter the cockpit before unlocking the doors and for other security purposes.

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Keep in mind that some hotels have strict no-smoking policies. If you are caught vaping in a hotel room, you could face fines or even be asked to leave. To avoid this, use a scent-neutralizer spray after vaping. These sprays help to eliminate the smell of vapor and can make it less noticeable to others.

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Electronic cigarettes that produce smoke without the use of a flame (e.g. iQOS) are allowed in carry-on baggage, but not in checked baggage. Furthermore, the use of electronic cigarettes while on board is prohibited due to the fact that it could make other passengers feel uncomfortable or cause misunderstanding.

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What you're seeing is mist — hot and humid outside air rapidly condensing upon contact with the aircraft's onboard air conditioning unit that creates billows of water vapor.

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