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| HD Theater |
Saturday 7/31/2010 - the day begins
This was one of those days where you're not sure what's going to happen but you know it's going to be one to remember. The day begins with a wake-up call from my iPod at 7:00AM (on a Saturday? <-expletive->); Fleetwood Mac left over from the night before. Not exactly the jolt one needs to get your feet on the floor and the rest of you relatively upright, but on this day it was just enough. Eight o'clock class - NAUI Advanced Scuba Diver - I've been looking forward to this for a while and have been seriously committed to it since the beginning of summer.
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| Scuba Quest Brandon, FL |
Class Part I - review the training material and practice a few navigation exercises
I check in at Scuba Quest just before eight am. Something of a miracle if you know how long it usually takes for me to get from the sheets to anything else in the morning. Here I meet up with my friend Kioni, who's actually the reason I am here on this day as we planned to go through this class together a while back.
We start reviewing the book and going over some key themes for this class which last for a couple of hours. We discuss buoyancy control and weight management, navigation, deep dives, photography, hunting and collecting, and other topics. After the classroom portion we practice some basic navigation and search patterns in the area behind the shop. Just enough to be able to say you've done it. Having completed that we load up the tanks and head over to the pool for the practical part of the class.
Class Part II - pool session
Today we are six students, including Kioni and myself, and our instructor, Brandon Brooks. We suit up, get our weights configured, and head over to pool's edge.
I should mention that I normally dive with 12-16 pounds of weight depending on my configuration (wet suit, salt or fresh water, other equipment, etc.). This being pool water (more importantly, non-salt water) and no wet suit or other crap hanging off of me I decide that even 12 is probably too much and drop my 6 pounds of non-dumpable weight. This is so that if I am still too heavy I can easily drop the remainder. I really start to question even taking this much as Brandon seems to hang on how much weight we're taking a little too much ("you sure that's how much you need?"). Knowing that our first test (super-secret diving skill #1) is to jump in with all of our gear in hand, sink to the bottom, then don our gear underwater, this seems like a prudent approach as I sure as hell don't want to gingerly drift down while holding my breath for 15'.
Just before we jump we soak our BC's in the pool and make sure that every last bit of air has been purged so as to not slow our descent. I volunteer to go in first, it's hotter than two goats in a pepper patch and I am ready to cool off a bit. I went up to the edge, and I stood and looked down (you know I lost a lot of friends there baby!) - gear in-hand, one.. two.. shit
I've had a tooth squeeze on the last few dives but it only really started hurting me around 60-70 feet, until just recently. I've noticed that in our pool at home I've started feeling discomfort at about six feet now occasionally. I am about to jump into 15' of water with no quick or easy way to ascend and relieve the pain if it hits. Oh well, too late to worry about that now.
...three, splash!
Normally, at this point my mind would be organizing and prioritizing tasks from most to least likely to cause my immediate death and developing a simple, methodical plan for dealing with each. Instead, it's focused on what to do if my tooth pain kicks in - a very real worry as that is one of the few pains that cannot be easily ignored, it requires immediate attention. For those not familiar with this pain, it feels like a dentists drill drilling right through your tooth from the inside out - without anesthetic.
Falling through the water I am relieved to find that the pain is not as pronounced and completely manageable, however, another problem has suddenly appeared - I need a breath, desperately, and haven't even begun to start the tasks necessary to take that first breath. My body starts to float upside down as it's positively buoyant and I am anchored to the gear in my hands which continues to sink. Simultaneously, I attempt to open the valve on my tank and locate one of my regulator hoses. Without my mask on it's pretty blurry but I am easily able to locate my octo hose as it is bright yellow (now I completely understand why). I am starting to become even more desperate for air but seem no closer than before as I am still fighting my buoyancy and trying not to drop everything while attempting two different tasks simultaneously. This is when instinct takes over, I drop everything and swim as quickly as I can for the surface. I break through - "shit!". Epic fail. My concern about my tooth pain proved too much of a distraction that derailed my task management. The good news, however, was that I now knew what to expect and could put that out of my head next time. I should have tested my tolerance to the pain before jumping in with my gear, in the right circumstance this could have cost me a lot more than frustration and embarrassment. Never forget that you are solely responsible for your own safety and should take appropriate steps to ensure that you are 100% ready to dive.
After retrieving my gear and watching everyone else, who all passed the first time btw, I was able to hop back in and complete it, no problem at all this time. Once back on the surface we tread water for a while holding our regulator and BC inflater hose above our heads. This is where I start to realize that even cutting my weight in half probably wasn't enough - this is work! After a while Brandon has me remove the last of my weight and continue. It's much easier but I am still sinking due to the negative buoyancy of the tank right now.
The air tank, when full of air, has a negative buoyancy and provides a downward or sinking force. As more air is used throughout the dive, the tank becomes more and more positively buoyant providing less of a downward force or even an upward or rising force. This becomes more relevant later, for now staying on the surface is easier than before.
Now Brandon has me use my regulator stop kicking. Still negatively buoyant, I start to sink. To my surprise I am able to sink all the way to the bottom without any weight at all! It would seem that I've been carrying 12-16 pounds too much weight on my previous dives. Now, I know there are other factors like salt water, wet suit, etc. that would make adding weight necessary but it would seem that I have been well overweight on my dives. This epiphany becomes a problem later tonight on my night dive, but for now I've learned something that makes me feel like a seasoned veteran and less like the fumbling neophyte in the water.
We next work on lifting heavy objects with the lift bag. The first lift I swim down to a bag of weight with the bag, hook it up, and inflate the bag with my octo. This lift is uncontrolled, just fill the bag with air and let it go. The second lift is controlled, ascending at the same pace (<30'/minute) that I ascend. This time, instead of just filling the bag with air I give it just enough air to lift the weight bag a few inches off of the bottom. Now I begin my ascent, "treasure" in-hand. As I ascend I have to constantly dump air from the bag as the pressure decreases to control my ascent. This is due to the dropping water pressure allowing the air inside the bag to expand even further thus increasing the amount of surface area exposed to the surrounding water which increases it's buoyancy, left unchecked my ascent would quickly become uncontrolled and very dangerous for me and anyone that maybe above.
This ends our pool work and the instructed portion of our certification. Now we have to complete six dives, each hitting a different area of diving within six months. The first three dives are set for us: Deep (over 60'), night, and navigation. The final three are chosen from a list of other dive types:
- Search and recovery
- Boat diving
- Light salvage
- Hunting and collecting
- Exploration and underwater mapping
- Non-penetration wreck diving
- Research diving
- Freshwater or ocean diving orientation
Kioni and I decide to go ahead and knock out night and navigation today and schedule a trip for this evening with Blue Water Explorers over in Brandenton, FL. More on that in the next post.