Here's my dive buddy, Linda, doing what she does really, really well ..... finding me things to photograph.
Looks pretty calm, cool, collected and comfortable doesn't she. Just the model for neutral buoyancy as she uses her flashlight to spot and point out small critters, going about their business on the reef.
But it wasn't always so.
For the non-divers that follow my blog, there are two ways to control your buoyancy underwater. One is to use the air volume in your lungs and the other is to use your BC (buoyancy compensator). That vest like device that she is wearing that is also holding the tank on her back.
Moving vertically is something that we don't do much on land. But it is something that you do alot underwater. It's pretty cool and pretty much like being able to fly. But it is one of the new skills that all divers must learn and one that many people struggle with in the beginning.
Early in our dive careers, pretty much all of us carry too much weight and therefore have to use large amounts of air in our BC to make adjustments.
This gets to be particularly challenging as we head for the surface. Air expands as the pressure of the water decreases, so you have to "dump" air from your BC.
When you are new to moving vertically all kinds of strange things can happen. Such as arriving at the surface with your butt over your head.
But the good folks that make BCs have thought of that and included a dump valve in the bottom of the BC.
The BC that Linda likes, the one you see in this picture, is made up of two parts - an outer shell and an inner bladder.
We did our very first night dive together, in Bonaire, a couple of years before this trip.
On that dive, Linda did arrive at the surface spontaneously and butt first, pulling for all she was worth on her "butt dump".
Pulling so hard in fact, that she had torn the valve right out of the BC and had pulled about a third of the bladder through that hole.
But that was along time ago. She is much calmer now, serene even.... as long as she is underwater.
Because Linda will tell you, she can't swim. That's not really true but it does make for someone who is not comfortable on the surface.
She is "one with their BC" and much more comfortable, underwater.... with a "breathing deally" in her mouth..