We are continuing our look into the rules of diving from the article by Cathryn Castle Garcia from Dive Training's Sept/Oct 2017 magazine. 
This week we look at the age old advice of "Always turn the tank valve back a quarter or half turn once on". This rule has been around for a very long time and had good intentions in the beginning but it is now something that should not be followed.
Orginally, SCUBA tanks had valves that would sometimes stick open if the full pressure from the tank was allowed to flow through them. The "rule" continued even after valves were changed to no longer 

Our exploration of the "rules" of diving continues. Remember, this is from the article by Catherine Castle Garcia in Sept / Oct 2017 Dive Training magazine.  
The rule this week is "No Gloves Allowed". This one actually is a rule in many tropical areas, especially where there is a danger of damaging the coral if you grab it. If you are not wearing gloves, you are less likely to reach out and touch it!  In some cases, there can be very stiff fines if divers are found wearing gloves while diving in these areas. 
For these situations, it is understandable, we want to protect fragile environments. However, not all environments are fragile, and so gloves will do no harm. In addition, there are some medical conditions that are aggravated by temperature changes. Gloves are a necessity to avoid pain and even possible medical emergencies! Now, these divers can get a doctors release to wear gloves, but it can be a hindrance to do so. Also, if they forget the release, it could ruin a dive trip! 
So, while we understand the reason for the rule, perhaps it could be a little less strict. On the other hand, we as divers can help by being more conscious of the environment we love to explore and look with our eyes, not with our hands!!