I enjoy scuba diving as a hobby.  Have you ever been scuba diving?
Nope never, I get scared of being underwater in the ocean or lakes
Yeah being underwater is often scary.  I prefer to scuba dive in less deep areas.  I really enjoy scuba diving in the Florida Keys.
You know "Scuba" refers to the underwater breathing apparatus?
Self contained underwater breathing apparatus.  The coolest thing I ever seen while scuba diving was a hammerhead shark.
I think the biggest threat is not shark per se but the severe physical stress on the diver
Definitely have to be safe on the way towards the surface.  The "bends" can be deadly.
The most scuba deaths are usually associated with poor gas management, so its mostly human error, you know.
Wow, I wasn't aware.  I'm always very conscience of my air supply while scuba diving.
Alternative air source
In underwater diving, an alternative air source, or more generally alternative breathing gas source, is a secondary supply of air or other breathing gas for use by the diver in an emergency. Examples include an auxiliary demand valve, a pony bottle and bailout bottle.
An alternative air source may be fully redundant (completely independent of any part of the main air supply system) or non-redundant, if it can be compromised by any failure of the main air supply. From the diver's point
Recreational dive sites
Recreational dive sites are specific places that recreational scuba divers go to enjoy the underwater environment. They include recreational diver training sites and technical diving sites beyond the range generally accepted for recreational diving. In this context all diving done for recreational purposes is included. Professional diving tends to be done where the job is, and with the exception of the recreational diving service industry, does not generally occur at specific sites chosen for their easy access, pleasant conditions or interesting features.
Recreational dive sites may be found