What are the safety reasons in particular? I can think of a few but was wondering more specifically you meant.
To name a few we've seen them snag in and around kelp and snap straps or remove masks, have seem them cause a mask to leak and fill constantly and quickly in a strong current, have even seen the stress and snap a mask strap during standard backward roll entry.
Also witnessed someone (from a charter boat, i assume he trained abroad) descend a shotline to a wreck at 40m and due to the surge get his (useless) snorkel caught on the shot line ripping his mask off causing him to panic and attempt to bolt for the surface. Can think of more items like that too. Our logic being its something that isn't needed, has absolutely no practical benefit to a diver and has the potential to cause safety problems so its not worn.
I can think of many pieces of gear I would consider unsafe on boats, do you have other rules like this for other gear?
Drysuits only for some of the offshore/further afield sites. My view is the UK is drysuit only all year but concede if some imbeciles want to freeze and only do 1 short dive a day in summer close to shore in a wetsuit they can. Further afield not allowed (i) due to the wind chill factor to/from the site but mainly if they get separated from the boat the survival time in a wetsuit is far far lower than a drysuit, especially if surface conditions are poor so for offshore sites its dry only.
Not really many other rules but depends on the dive being done and so on. Wouldn't allow a sea cave dive with a single tank, no reel and no torch for example. Other than no snorkels and dry only for offshore people can generally do what they like as long as its not outright dangerous.
I think not allowing snorkels is on par with making people wear them
![Winking :wink: :wink:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Whilst I leave mine at home, I don't expect my own choices to be enforced on others. An adult should be allowed to make their own decisions about gear, even if others find them unsafe.
Quite possibly but dive clubs here work differently. One person elected by the club is legally responsible for ensuring the dive is carried out as safely as possible and answerable to the authorities if something goes wrong. Going from that the person cannot allow people to dive in a way he would class as dangerous. Its different for a paid commercial charter where nobody is responsible except the diver themselves (which is why no qualifications are needed or even checked, no buddy is required and so on).
For example, if i allowed someone to dive with a snorkel and they had an incident and got hurt (mask ripped off, paniced, bolted to surface, embolised or whatever). The inquiry would be something like:
"do you wear a snorkel for the dive?" ... No
"Why not?"...I consider them completely useless and dangerous
"So you allowed someone to dive in a way you would not do so yourself and in your view was dangerous?"....Yes
<game over>
As i said, thats for the way clubs work here. For a charter you could be a completely unqualified diver turning up solo with a 25ft snorkel and only a fire extinguisher for a gas tank and they'd let you dive as there's no responsibility to the captain for the diving there so its a different situation.