Be a man and gut it! :)
In all seriousness though, by regulation the NCO who corrected you WAS correct.
I dipped my entire 20 years in the Navy and ran into the same issues. Some supervisors wanted me to dip in the smoke pit while others didn't give a shit as long as I didn't walk around with a huge wad in my lip, spit dripping out of my mouth, carrying around an open spit cup, etc.
What I do now is I use the Skoal pouches. I've gotten my "fix" down to two pouches a dip and I also spit very rarely. I don't gut it, but it doesn't produce very much saliva at all.
When my ass is dragging or I am ill, I do not buy gasoline at ARCO! The temptation is too great!
A few years ago, at a Marine Corps Birthday Ball at La Costa Resort, just North of San Diego, I actually refused a celebratory cigar from the host/organizer. I simply said I was addicted!
Army Regulation 600-63, Army Health Promotion, paragraph 7 to 3a, which states: "Tobacco use is prohibited in all Department of the Army occupied workplaces except for designated smoking areas, as authorized by DODI 1010.15, Smoke-Free DOD Facilities. The workplace includes any area inside a building or facility over which DA has custody and control, and where work is performed by military personnel, civilians or persons under contract to the Army."
There is a TON of evidence that smoking is a major health hazard but NO evidence that smokeless tobacco is a hazard at all. In fact, it has been shown scientifically that if you are a smoker and have a nicotine addiction, switching to smokeless tobacco is a much safer alternative. The carcinogenic factor in tobacco (like most anything else) gets fired up, quite literally, when the tobacco gets fired up, that is when it's burned. The carcinogenic factor is tobacco smoke (with its high content of carbon monoxide--just like any kind of smoke is carcinogenic). The carcinogenic factor in smokeless tobacco is about the same as found in broccoli, or ANY other plant that you stick in your mouth and spit out. I surely hope that the Army figures this out and gets rid of the smokeless tobacco prohibitions in AR 600-63. They are clearly relying on popular opinion here. Using smokeless tobacco is a very safe and effective means of quitting smoking. See the attachment for a start, but do your own research instead of letting the Army do it for you.
This regulation is based on bad science with no research. In fact, in a recent visit to an Army dentist he told me that he is no longer discouraging smokeless tobacco use in his patients because it produces saliva which helps fight cavities. Furthermore there is no causal connection between ST use and any form of mouth cancer (however there is MAJOR causal connection between smoking and/or heavy drinking, but read the article I posted. There are others online, but this is from an endowment from the University of Alberta that is trying to help people quit smoking concluding that smokeless tobacco use is a safe way to do that.
FAQ: Health Effects (tobaccoharmreduction.org)
Contrary to popular belief, smokeless tobacco is not a major health hazard. In fact, it has not been definitively linked to any deadly disease. More important, to the extent that it causes any risks, the scientific evidence clearly shows that the risks are very small (See Lee & Hamling 2009).
if you want more specific information on the matter you will need to start with DOD instructions then work your way down, As we all work for the DOD, it will have the least stringent rules and then they will only get stricter on your way down to your level.
The following link is a Surgeon General Article on Tobacco Restrictions within the military.
http://www.surgeongeneral.gov/library/reports/50-years-of-progress/sgr50-chap-14-app14-1.pdf
FYI If you were to go by the book, tobacco usage within any federal building is prohibited, this includes dipping, e-cigs, etc.
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Army Regulations
Smokeless Tobacco
