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NOAA Check Out Skills - Complete Video

Oct 20

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Transcript Content


00:00:05.000 --> 00:00:07.000
[underwater exhalation]

00:00:21.433 --> 00:00:26.766
Hi, my name is Bill Gordon. I am the Instructor Trainer at the NOAA Diving Center in Seattle, Washington.

00:00:26.766 --> 00:00:31.866
The video you're about to watch contains 10 of the skills you will be required to perform during your check out dive.

00:00:31.866 --> 00:00:36.132
They are intentionally performed in slow, exaggerated motion to give us the opportunity

00:00:36.133 --> 00:00:40.133
to demonstrate or highlight some of the more important sub-skills.

00:00:40.133 --> 00:00:45.099
Every diver in the NOAA Diving Program needs to be proficient in these fundamental skills.

00:00:45.100 --> 00:00:47.700
The skills we will talk about are: mask clearing,

00:00:47.700 --> 00:00:49.200
regulator clearing,

00:00:49.200 --> 00:00:51.000
regulator recovery,

00:00:51.000 --> 00:00:52.566
controlled descent,

00:00:52.566 --> 00:00:54.232
controlled ascent,

00:00:54.233 --> 00:00:56.333
use of an alternate air source,

00:00:56.333 --> 00:00:57.766
buddy breathing,

00:00:57.766 --> 00:01:01.232
use of NOAA's redundant air Supply System or RASS,

00:01:01.233 --> 00:01:02.933
weight belt remove and replace,

00:01:02.933 --> 00:01:04.799
and scuba unit remove and replace.

00:01:05.633 --> 00:01:07.333
Although these skills are not specific to NOAA,

00:01:07.333 --> 00:01:09.866
they are part of the training that every diver should receive.

00:01:09.866 --> 00:01:13.032
These skills are the foundation of safe diving.

00:01:18.200 --> 00:01:21.933
At some point in your diving career your mask is going to get knocked off your face.

00:01:21.933 --> 00:01:26.766
Maybe you're following somebody too closely and you get kicked in the face...that's your fault!

00:01:26.766 --> 00:01:29.299
or your mask strap breaks... things just happen...

00:01:29.300 --> 00:01:32.900
and of course your mask may fog and water may leak in.

00:01:32.900 --> 00:01:36.966
In this video we're going to demonstrate how to remove and replace your mask.

00:01:38.366 --> 00:01:43.399
To clear the fog from the inside of your mask, break the seal on the top and let water enter.

00:01:43.400 --> 00:01:48.466
To clear the mask, apply pressure to the top, relieve pressure from the bottom

00:01:48.466 --> 00:01:54.232
and as you roll your head back exhale through your nose.

00:01:54.233 --> 00:01:59.033
Notice how when the water comes in contact with the lens it clears the fog.

00:01:59.033 --> 00:02:01.666
We do this skill so we can see when we are underwater.

00:02:01.833 --> 00:02:07.999
Make sure when you exhale you leave a space between the bottom of your nose and the inside of the nose pocket.

00:02:09.766 --> 00:02:11.266
Break the seal,

00:02:11.266 --> 00:02:13.966
let water enter the mask,

00:02:13.966 --> 00:02:17.432
apply pressure to the top, relieve pressure from the bottom

00:02:17.433 --> 00:02:20.699
and as you exhale, roll your head back.

00:02:22.233 --> 00:02:25.133
When we remove a mask,

00:02:25.133 --> 00:02:28.233
first you flood it and then pull it away from your face.

00:02:28.233 --> 00:02:34.566
To replace the mask, you can either put the mask against your face and form a seal and then put the strap on,

00:02:34.566 --> 00:02:36.332
or you can put the strap on

00:02:36.333 --> 00:02:38.366
and then put the mask on your face.

00:02:38.366 --> 00:02:43.799
If you're wearing a hood, make sure that the mask only comes in contact with your face.

00:02:43.800 --> 00:02:49.233
If the mask goes from your face and over your hood it will leak where the two meet.

00:02:51.166 --> 00:02:57.599
Apply pressure to the top, relieve pressure from the bottom, as you roll your head back exhale through your nose.

00:02:57.600 --> 00:02:58.666
That's how you clear a mask.

00:03:03.833 --> 00:03:09.666
Whenever you put a regulator back in your mouth underwater you need to clear it before you can breathe from it again.

00:03:09.666 --> 00:03:14.099
This is perhaps the simplest and most dangerous of all the skills you will have to perform.

00:03:15.000 --> 00:03:18.966
The most important rule in scuba diving is: never hold your breath.

00:03:18.966 --> 00:03:24.432
If you hold your breath while you ascend, the gas will expand and can seriously injure or kill you.

00:03:24.433 --> 00:03:28.666
This is why any time a regulator comes out of your mouth you must blow a steady stream of bubbles.

00:03:29.533 --> 00:03:32.566
This has to be a habit and needs to be performed from muscle memory.

00:03:32.566 --> 00:03:36.132
It has to happen without thinking in order for you to be a safe diver.

00:03:36.133 --> 00:03:38.466
Never hold your breath when you're scuba diving.

00:03:39.600 --> 00:03:43.866
In this video we are going to demonstrate the two methods for clearing a second stage.

00:03:43.866 --> 00:03:46.066
The first method is the blast method

00:03:46.066 --> 00:03:48.699
and the second method is the purge method.

00:03:48.700 --> 00:03:50.933
Remember: any time a regulator is out of your mouth

00:03:50.933 --> 00:03:53.199
you must blow a steady stream of bubbles.

00:03:55.400 --> 00:04:00.633
This is the blast method. Take the regulator out, point it mouthpiece down so that it doesn't free flow...

00:04:00.633 --> 00:04:02.733
...steady stream of bubbles...

00:04:02.733 --> 00:04:08.233
To clear the second stage, you simply cough forcefully through it.

00:04:08.233 --> 00:04:10.666
The purge method, when you take the regulator out

00:04:10.666 --> 00:04:13.132
... make sure you blow a steady stream of bubbles....

00:04:13.133 --> 00:04:17.666
when you put the regulator back in, put your tongue in the hole of the mouthpiece

00:04:17.666 --> 00:04:19.532
before you push the purge button.

00:04:19.533 --> 00:04:24.966
When you push the purge button, it clears the second stage.

00:04:24.966 --> 00:04:29.732
When you take a regulator out, if you point it mouthpiece up, it will free flow.

00:04:29.733 --> 00:04:33.899
And you can go through about 1500 PSI per minute.

00:04:33.900 --> 00:04:38.066
So make sure any time a regulator is out, you point it mouthpiece down.

00:04:38.066 --> 00:04:42.632
Remember: the most important rule of scuba diving is never hold your breath.

00:04:49.500 --> 00:04:55.533
At some time in your diving career, your regulator is going to get pulled from your mouth and you'll have to know how to retrieve it.

00:04:55.533 --> 00:05:00.299
Something might get caught on a regulator hose or you might run into something, it will happen.

00:05:00.300 --> 00:05:04.666
The important thing is not to panic. Just remember to keep blowing a steady stream of bubbles

00:05:04.666 --> 00:05:08.966
while you recover your regulator and never hold your breath.

00:05:09.166 --> 00:05:14.732
If for some reason your regulator falls out of your mouth and you need to recover it, there are several ways to do this.

00:05:14.733 --> 00:05:17.333
In this video you will see the following methods:

00:05:17.466 --> 00:05:19.499
The Right Hand Sweep,

00:05:19.500 --> 00:05:20.800
the Tank Tilt,

00:05:20.800 --> 00:05:22.300
and the Invert Method.

00:05:23.533 --> 00:05:29.133
Here, the diver has taken the regulator out of their mouth and thrown it over their right shoulder.

00:05:29.133 --> 00:05:32.899
Notice that the diver's always blowing a steady stream of bubbles.

00:05:32.900 --> 00:05:37.833
To recover the regulator using the Right Hand Sweep Method, the diver leans to the right.

00:05:37.833 --> 00:05:42.766
Notice how the hose falls away from the diver's body making room for the right arm

00:05:42.766 --> 00:05:47.032
and then does a big sweep ending up with their hand pointing straight up.

00:05:47.033 --> 00:05:53.466
95% of the time that hose is going to be on your right shoulder when you go to find it with your left hand.

00:05:53.466 --> 00:05:56.732
That was the Right Hand Sweep Method.

00:05:56.733 --> 00:05:59.733
Here again, diver takes the regulator out

00:05:59.733 --> 00:06:04.833
but this time puts it back behind their head. Notice the steady stream of bubbles.

00:06:04.833 --> 00:06:11.599
Anytime a regulator is out of your mouth you must blow a steady stream of bubbles. You cannot hold your breath.

00:06:11.600 --> 00:06:14.766
For the Tank Tilt Method, you reach back with your left hand

00:06:14.766 --> 00:06:18.399
grab the bottom of the scuba cylinder or the bottom of your BC jacket

00:06:18.400 --> 00:06:22.700
and with your right hand, reach over your shoulder and find the first stage.

00:06:23.200 --> 00:06:28.466
Once you find the first stage, the hose in the front of the first stage on the right side

00:06:28.466 --> 00:06:34.099
is the hose you're after. That we'll get you to your second stage.

00:06:35.933 --> 00:06:42.033
Watch again.

00:06:42.033 --> 00:06:44.599
Diver takes the regulator out,

00:06:44.600 --> 00:06:46.600
puts it back behind their head,

00:06:46.600 --> 00:06:52.733
but here they're not able to find it. You look and look: you can't find it. We have other options.

00:06:52.733 --> 00:06:54.433
Just think about it.

00:06:54.433 --> 00:06:59.033
Up front we have our alternate air source or our Atomic that we can breathe from.

00:06:59.033 --> 00:07:03.066
Until you find your primary regulator, whichever method you use,

00:07:03.066 --> 00:07:08.199
go ahead and breathe from your Atomic. You get smart points for this.

00:07:08.200 --> 00:07:13.166
Notice that any time a regulator is out of the diver's mouth they blow a steady stream of bubbles.

00:07:13.166 --> 00:07:17.899
you may be ascending while you are doing this skill.

00:07:17.900 --> 00:07:23.333
If that method doesn't work, there's another method. It's called the Invert Method.

00:07:23.333 --> 00:07:26.199
So here the diver was'nt able to find it.

00:07:26.200 --> 00:07:31.566
so we invert. There is a little swirl to help that hose go around your snorkel.

00:07:31.566 --> 00:07:38.732
That will free your regulator from back behind your head.

00:07:43.466 --> 00:07:46.566
Divers need to be able to perform a controlled descent

00:07:46.566 --> 00:07:50.199
and must be able to slow or stop if they have a problem clearing their ears or sinuses.

00:07:50.200 --> 00:07:53.233
Not all dives are on the bottom.

00:07:53.233 --> 00:07:55.233
Some dives are mid-water or on a ship's hull.

00:07:55.233 --> 00:07:59.899
if you plan a dive to a certain depth, you should not exceed that depth or your dive tables will change.

00:08:00.700 --> 00:08:04.733
In the case of Nitrox you may have a maximum depth based on what you are breathing.

00:08:07.100 --> 00:08:10.966
Before you make a controlled descent, there are a few things you need to do.

00:08:10.966 --> 00:08:14.399
Check with your dive buddies and make sure they are ready to leave surface.

00:08:14.400 --> 00:08:18.733
Get a compass heading on the beach, or your exit point, as a reference.

00:08:18.733 --> 00:08:24.066
Check your cylinder pressure and then check your time so you know when your dive starts.

00:08:24.066 --> 00:08:31.832
To make a controlled descent, put your inflator/ deflator high above your left shoulder and vent air from your BC until you start to descend.

00:08:31.833 --> 00:08:38.066
On the way down, if you need to, You can add small bursts of air to your BC to control your descent.

00:08:38.066 --> 00:08:43.199
When making a controlled descent we always keep our feet beneath us so if we need to use our fins

00:08:43.200 --> 00:08:48.366
to slow or stop our descent because of ear or sinus issues, we can.

00:08:48.366 --> 00:08:56.499
We only descend as fast as the slowest diver in the team and we always stay together as buddy teams when diving.

00:08:56.500 --> 00:08:57.966
That's a controlled descent.

00:09:02.466 --> 00:09:06.266
Your bottom time ends when you start to make a direct ascent to the surface.

00:09:06.266 --> 00:09:13.966
It's important that you're able to control your ascent because dive tables are based on an ascent rate of no faster than 30 feet per minute.

00:09:13.966 --> 00:09:17.166
There are a few things you need to adjust in order to moderate your ascent.

00:09:17.166 --> 00:09:20.332
For example, the air inside your BC starts to expand.

00:09:20.333 --> 00:09:24.533
Also gas trapped in your exposure protection will expand and increase your ascent rate.

00:09:24.800 --> 00:09:29.966
You need to stay with your dive buddies and everyone in the group should ascend at the same rate.

00:09:31.800 --> 00:09:35.400
Before you make a controlled ascent there are a few things you need to do.

00:09:35.400 --> 00:09:39.000
Check with your dive buddies and make sure they are ready to leave bottom.

00:09:39.000 --> 00:09:44.066
check your cylinder pressure and then check your dive time so you know when your dive ends.

00:09:44.066 --> 00:09:47.532
Hand positions are very important during a controlled ascent.

00:09:47.533 --> 00:09:52.499
All divers should always have their right hand with a closed fist above their head.

00:09:52.500 --> 00:09:54.600
The closed fist protects your fingers.

00:09:55.100 --> 00:09:58.500
The fist above your head protects your head from overhead obstructions.

00:09:59.566 --> 00:10:03.832
All divers always look above themselves and their dive buddies for overhead obstructions

00:10:03.833 --> 00:10:06.933
and we can only ascend as fast as the slowest diver in the buddy team.

00:10:07.633 --> 00:10:11.366
The proper ascent rate is no faster than 30 feet per minute.

00:10:21.733 --> 00:10:28.566
When the divers get to the surface, the first thing they do is inflate their BCs so that they're positively buoyant.

00:10:33.400 --> 00:10:36.566
This is why we always dive in buddy teams:

00:10:36.566 --> 00:10:42.999
if the diver has an equipment malfunction or runs out of air and does not have a RASS to perform a self-rescue

00:10:43.000 --> 00:10:44.900
their dive buddy will be there to rescue them.

00:10:44.900 --> 00:10:48.900
One way to do this is to use your alternate air source.

00:10:48.900 --> 00:10:55.500
At NOAA we use the Atomic SS1 as an alternate air source/inflator. We often refer to it as the Atomic.

00:10:56.166 --> 00:11:03.532
When using the Atomic, the donor breathes from their alternate air source and passes off their primary regulator to the out-of-air diver.

00:11:06.733 --> 00:11:09.933
Here, the diver on the right has run out of air.

00:11:09.933 --> 00:11:15.533
The diver on the left is the donor and offers up their primary regulator.

00:11:15.533 --> 00:11:20.099
Both divers go to proper hand positions.

00:11:20.100 --> 00:11:28.733
Let's look at where the Atomic is. In the case of the donor, on the left hand side, the donor's breathing from the Atomic

00:11:28.733 --> 00:11:32.266
and the donor can also add or subtract air from their BC.

00:11:33.100 --> 00:11:36.600
The recipient, the person out of air,

00:11:36.600 --> 00:11:40.533
has their inflator high up above their left shoulder because, as they make an ascent,

00:11:40.533 --> 00:11:44.699
they may need to vent air from their BC as they go up.

00:11:44.700 --> 00:11:49.633
Also when they get to the surface, they need to find their alternate air source inflator so they can orally inflate their BC.

00:11:54.600 --> 00:11:58.866
So here we see the right hand - it's right hand to left shoulder.

00:11:58.866 --> 00:12:01.499
And looking straight down you see the hook up.

00:12:01.500 --> 00:12:10.100
It's an open box in the middle. there are no crossed arms. both divers are facing each other.

00:12:10.100 --> 00:12:14.600
Once the out-of-air situation is solved and you get a breathing rhythm going

00:12:14.600 --> 00:12:17.433
both divers ascend to the surface.

00:12:17.433 --> 00:12:21.933
Now, for the person out of air, it's not a free ride! You have to kick as well.

00:12:21.933 --> 00:12:26.466
The donor is not just going to inflate their BC and drag you to the surface.

00:12:26.466 --> 00:12:30.266
Both divers have to kick to get to the surface.

00:12:30.266 --> 00:12:32.532
When you get to the surface,

00:12:32.533 --> 00:12:37.533
the person that is out of air is going to have to orally inflate their BC.

00:12:37.533 --> 00:12:42.566
So when they get to the surface, they have to kick hard and orally inflate their BC.

00:12:42.566 --> 00:12:47.099
The donor keeps the regulator in their mouth - that's the Atomic -

00:12:47.100 --> 00:12:53.333
fully inflates their BC and provides positive buoyancy for the person that's out of air.

00:12:53.333 --> 00:12:55.366
So watch as they come to the surface.

00:12:55.866 --> 00:12:57.299
Here is the second view.

00:12:58.033 --> 00:13:02.799
The donor on the left keeps the regulator in and their BC is fully inflated.

00:13:02.800 --> 00:13:06.733
The recipient, on the right, has to orally inflate their BC.

00:13:06.733 --> 00:13:10.466
Once both divers are positively buoyant, the skill is over.

00:13:17.033 --> 00:13:20.533
This is why we always dive in buddy teams:

00:13:20.533 --> 00:13:26.166
if a diver has an equipment malfunction or runs out of air their dive buddy can rescue them.

00:13:26.166 --> 00:13:31.766
If the diver who has run out of air does not have a RASS and cannot perform a self-rescue

00:13:31.766 --> 00:13:34.432
their dive buddy will need help them.

00:13:34.433 --> 00:13:38.199
If your alternate air source is not working or your dive buddy does not know how to use it

00:13:38.200 --> 00:13:42.133
your next best alternative is to share your primary regulator.

00:13:42.133 --> 00:13:43.766
We call this buddy breathing.

00:13:45.966 --> 00:13:49.366
Here, we see the diver on the right has run out of air.

00:13:49.366 --> 00:13:54.766
The diver on the left is the donor and the diver on the right is the recipient.

00:13:54.766 --> 00:13:57.066
Notice the hand positions.

00:13:57.066 --> 00:14:04.099
The donor keeps control of the regulator by holding on to the second stage hose where it hits the second stage body.

00:14:04.100 --> 00:14:08.500
The recipient holds on to the donor's wrist.

00:14:08.500 --> 00:14:12.433
Think of this skill as if you're doing it in dark water where you can't see.

00:14:12.433 --> 00:14:16.966
The only time you would let go of that regulator or that wrist is in order to purge it.

00:14:16.966 --> 00:14:21.699
Other than that, you're going to keep control of it all the way to the surface.

00:14:21.700 --> 00:14:27.666
When you pass a regulator, you pass the regulator mouthpiece down so the second stage doesn't free flow.

00:14:27.666 --> 00:14:32.766
Any time there's not a regulator in your mouth you need to be blowing a steady stream of bubbles.

00:14:32.766 --> 00:14:37.732
Two quick breaths; mouthpiece down.

00:14:37.733 --> 00:14:40.366
Two breaths...

00:14:40.366 --> 00:14:44.799
...mouthpiece down so it doesn't free flow.

00:14:44.800 --> 00:14:48.000
Hand positions: every hand is busy.

00:14:48.000 --> 00:14:53.033
The person that is out of air is reaching straight across to the donor's left shoulder strap

00:14:53.033 --> 00:14:57.466
being careful not to trap their alternate air source hose.

00:14:57.466 --> 00:15:02.866
The donor is holding their alternate air source inflator high above the left shoulder.

00:15:02.866 --> 00:15:07.899
Here, the diver can control the buoyancy as both divers head to the surface.

00:15:07.900 --> 00:15:18.466
Remember: the person that is out of air will not be able to add air to their Buoyancy Compensator.

00:15:18.466 --> 00:15:22.666
We'll go around and take a look at hand positions.

00:15:22.666 --> 00:15:29.632
Any time a regulator is not in your mouth make sure you're blowing a steady stream of bubbles.

00:15:29.633 --> 00:15:31.999
Notice that they are not cross grabbing.

00:15:32.000 --> 00:15:36.700
Any hand that is holding on to something reaches directly across.

00:15:36.700 --> 00:15:43.633
This way the divers can look at each other as they're heading to the surface to make sure everything is OK.

00:15:43.633 --> 00:15:49.199
After you've established a rythm, two quick breaths, pass the regulator mouthpiece down,

00:15:49.200 --> 00:15:53.466
then the divers will begin to make their ascent.

00:15:53.466 --> 00:15:59.732
If you're the person out of air, it isn't a free ride to the surface. You still have to kick.

00:15:59.733 --> 00:16:02.866
The person that's the donor, that still has air,

00:16:02.866 --> 00:16:06.032
when they get to the surface will fully inflate their BC

00:16:06.033 --> 00:16:10.566
and keep the regulator in their mouth, being prepared to be used as a buoy.

00:16:10.566 --> 00:16:17.332
The person that's out of air has to breathe from ambient or surface air and orally inflate their BC.

00:16:17.333 --> 00:16:19.599
The donor keeps the regulator in their mouth

00:16:19.600 --> 00:16:22.000
and also pushes up on the recipient.

00:16:22.000 --> 00:16:23.800

00:16:23.800 --> 00:16:26.066
A surface view.

00:16:26.066 --> 00:16:31.466
We see the diver on the right, out of air, kicking hard and orally inflating their BC.

00:16:31.466 --> 00:16:35.799
The donor keeps the regulator in and has their BC fully inflated.

00:16:43.366 --> 00:16:49.499
At NOAA, when doing working dives or in situations with limited visibility, overhead environments, or where you can be separated

00:16:49.500 --> 00:16:54.933
from you dive buddy, divers are required to carry a redundant air supply system.

00:16:54.933 --> 00:16:57.699
At NOAA, we call this a RASS.

00:16:57.700 --> 00:17:04.466
Ideally, all divers on all dives should be self- sufficient and carry a RASS. You'll be happy you had one if you ever run out of air.

00:17:05.933 --> 00:17:08.366
The video we are about to see is RASS to the surface.

00:17:08.366 --> 00:17:12.332
So here a diver has run out of air and there's been a buddy separation,

00:17:12.333 --> 00:17:14.666
so the diver must make it to the surface.

00:17:14.666 --> 00:17:16.832
Here the diver has run out of air...

00:17:17.000 --> 00:17:20.766
Now, here we find a "known". We know the bottom of the cylinder.

00:17:20.766 --> 00:17:29.232
Once you find the bottom of the cylinder you can find the rest of the components. So this is a habit we're starting early on in all divers.

00:17:29.233 --> 00:17:32.866
Later on if you go to do decompression diving you might be wearing a sling bottle on the side.

00:17:32.866 --> 00:17:36.066
This might be required decompression gas.

00:17:36.066 --> 00:17:39.399
Or you might have a ceiling or overhead stops required.

00:17:40.000 --> 00:17:41.466
So we start habits here.

00:17:41.466 --> 00:17:47.366
Find the bottom of the cylinder. From the bottom of the cylinder you can find the second stage.

00:17:47.366 --> 00:17:50.366
From the second stage you can find the on/off valve.

00:17:50.366 --> 00:17:54.632
From the on/off valve you know we are at the first stage, from the first stage you can find the pressure gauge.

00:17:54.633 --> 00:18:01.166
so from one known location you can find all the components on the pony bottle. So let's watch all those steps.

00:18:01.166 --> 00:18:05.932
From a known, to the on/off valve, from the on/off valve, to the second stage,

00:18:05.933 --> 00:18:07.366
purge it,

00:18:07.366 --> 00:18:09.532
put it in your mouth and breathe from it.

00:18:09.533 --> 00:18:11.499
any time a diver

00:18:11.500 --> 00:18:17.000
doesn't have a second stage in their mouth they need to be blowing a steady stream of bubbles.

00:18:17.000 --> 00:18:26.400
So even in between the second stage and orally inflating the BC there's still a steady stream of bubbles coming out of the diver's mouth.

00:18:26.400 --> 00:18:30.400
Here we are adding 2 to 3 breaths to the BC

00:18:30.400 --> 00:18:34.966
and you're catching that air inside your BC. This is going to make your ascent much easier.

00:18:34.966 --> 00:18:39.566
That air that you've captured inside your BC is going to expand on your way to the surface.

00:18:39.566 --> 00:18:47.566
Hand positions. Here we have the right hand with a closed fist above our head. A closed fist protects your fingers.

00:18:47.566 --> 00:18:51.766
A closed fist also protects your head from overhead obstructions.

00:18:51.766 --> 00:18:58.299
your left hand holds the BCD inflator/deflator at the highest point above your left shoulder.

00:18:58.300 --> 00:19:03.500
A couple reasons for doing this: as you're ascending to the surface the air trapped inside your BC

00:19:03.500 --> 00:19:08.733
is going to expand. You may need to vent some air from your BC to slow down your ascent.

00:19:08.733 --> 00:19:10.733
also when you get to the surface

00:19:10.733 --> 00:19:17.399
you have to orally inflate your BC, so when you get to the surface you've already located the thing you have to blow air into.

00:19:17.400 --> 00:19:24.066
That's the alternate air source inflator or the second stage located in your left hand.

00:19:24.066 --> 00:19:32.599
Here you see as the diver ascends to the surface, less and less effort is required. The air trapped in the BC is starting to take over.

00:19:32.600 --> 00:19:39.133
Still, when the diver gets to the surface go ahead and take the second stage out and you take breaths from ambient air

00:19:39.133 --> 00:19:43.399
and you blow that air into your BC.

00:19:46.333 --> 00:19:50.099
Once you are at the surface, go ahead and ditch the second stage

00:19:50.100 --> 00:19:56.566
taking big breaths from ambient air and pushing the yellow button directly in front of the mouthpiece with your two fingers.

00:19:56.566 --> 00:20:02.332
Only blow when you're pushing the button, that will capture air inside your BC.

00:20:02.333 --> 00:20:04.533
The skill is over when the diver is positively buoyant.

00:20:04.533 --> 00:20:08.466

00:20:08.466 --> 00:20:12.132
This video is going to be a demonstration of weight belt removal and replacement on the bottom.

00:20:12.133 --> 00:20:16.299
Reasons you need to be able to do this: during a high entry, when you hit the water

00:20:16.300 --> 00:20:21.700
your weight belt may get bumped a little loose and you might need to tighten it back up.

00:20:21.700 --> 00:20:28.633
As you descend in the water column the neoprene that you are wearing compresses and you physically get smaller as you go to depth

00:20:28.633 --> 00:20:31.799
so you may need to adjust your weight belt as well.

00:20:31.800 --> 00:20:40.100
When you get out of the water, into a small boat, it is much easier to hand your weight belt to the people in the boat to climb inside.

00:20:40.100 --> 00:20:41.800
So these are just a couple of examples.

00:20:43.166 --> 00:20:49.566
Weight belt: remove and replace. First thing we need to do is to let all the air out of our Buoyancy Compensator or BCD.

00:20:49.566 --> 00:20:53.632
You want to be as negative as possible on the bottom when you are doing this skill.

00:20:53.633 --> 00:20:58.599
With your right hand you are going to reach around the front, you are going to pop open the buckle

00:20:58.600 --> 00:21:04.100
and as you take the weight belt off make sure and keep it on top of you. Keep the weight on top of you during this entire skill.

00:21:04.100 --> 00:21:06.933
Make the equipment do the work.

00:21:06.933 --> 00:21:10.733
When you go to put your weight belt back on

00:21:10.733 --> 00:21:14.199
you roll away from the belt

00:21:14.200 --> 00:21:19.533
keeping the weight on top of you; make the weight belt do all the work. You slide the weight belt up

00:21:19.533 --> 00:21:21.299
and then, before you do the buckle,

00:21:21.300 --> 00:21:28.766
make sure that your gauge console or your alternate air source or octopus isn't trapped underneath the belt.

00:21:28.766 --> 00:21:33.299
The trick here is making the equipment do all the work for you.

00:21:33.300 --> 00:21:37.533
we'll take a look at this from another view. This is a side view.

00:21:37.533 --> 00:21:41.999
Same thing: all the air out of your BC.

00:21:42.000 --> 00:21:46.533
With your right hand, reach around the front,

00:21:46.533 --> 00:21:48.599
pop the buckle

00:21:48.600 --> 00:21:54.766
but immediately put the weight back on top of you. It's really important that you do this with the proper technique.

00:21:54.766 --> 00:22:01.732
These are light belts here, these might be 12 or 16 pound belts. When you are doing this skill in cold water

00:22:01.733 --> 00:22:08.733
you might be wearing a 25 to 35 pound weight belt. The technique is massively important then.

00:22:08.733 --> 00:22:20.033
Again, make sure not to trap your gauge console or alternate air source or octopus.

00:22:20.033 --> 00:22:22.633
And there you go, that was a good example of weight belt: remove and replace on the bottom.

00:22:26.866 --> 00:22:28.766
There are a couple of reasons you want to be able to do this:

00:22:28.766 --> 00:22:32.066
first of all it is one of the required skills that you need to do during your check out dive.

00:22:32.066 --> 00:22:38.732
But also, what is built into this skill is the muscle memory where you learn where everything is

00:22:38.733 --> 00:22:41.666
and how the buckles and clips on your BC work

00:22:41.666 --> 00:22:44.732
and also when you get into week two of the class

00:22:44.733 --> 00:22:48.733
some of that muscle memory is relied upon for the rescue portion

00:22:48.733 --> 00:22:52.733
because during rescue you have to undo buckles and clips and loosen shoulder straps

00:22:52.733 --> 00:22:55.733
and remove the BCD from the diver as you do a complete rescue.

00:22:55.733 --> 00:22:57.499
So that's the reason we do it like this.

00:22:58.833 --> 00:23:04.466
BCD: remove and replace. The first thing you want to do is let all the air out of your BC.

00:23:04.466 --> 00:23:10.766
You want it as negatively buoyant as possible.

00:23:10.766 --> 00:23:14.266
You're going to loosen up the shoulder straps; you have a buckle over each shoulder.

00:23:14.266 --> 00:23:21.232
You want the shoulder straps open as far as possible, that makes this skill much easier.

00:23:21.233 --> 00:23:27.199
Next thing you are going to do is take your gauge console - notice how it runs under your left shoulder strap and under your left arm -

00:23:27.200 --> 00:23:34.333
you are going to back that out and put it in your BC pocket.

00:23:34.333 --> 00:23:37.766
At your waist, on the front, there's a plastic buckle.

00:23:37.766 --> 00:23:43.066
Undo that. underneath that is a Velcro cummerbund, undo that as well.

00:23:43.066 --> 00:23:49.366
Remember that the regulator comes over your right shoulder, so we want to take this off like a jacket

00:23:49.366 --> 00:23:54.499
taking your left arm out first, that way you can keep the regulator in your mouth during the entire skill.

00:23:54.500 --> 00:23:56.500
Then, with your right hand reach back behind you

00:23:56.500 --> 00:24:01.900
either grab the bottom of the scuba cylinder or the bottom of your scuba jacket

00:24:01.900 --> 00:24:04.900
and take it off like we just did here.

00:24:04.900 --> 00:24:09.933
check to make sure there is nothing wrapped around your first stage; that your cam band is done properly

00:24:09.933 --> 00:24:15.633
and then to put it back on, put your right arm in first. Remember the regulator hose comes over your right shoulder.

00:24:15.633 --> 00:24:19.599
With your right hand push the scuba unit up against your back

00:24:19.600 --> 00:24:30.200
and hook down with your left hand trying to find that large shoulder strap hole.

00:24:30.200 --> 00:24:35.133
Then, find the cummerbund up front

00:24:35.133 --> 00:24:38.699
do the Velcro cummerbund and then the buckle that is in front of that.

00:24:38.700 --> 00:24:46.166
And remember that we put our gauge console in our BC pocket, that way it can't get tangled up front when we put our scuba unit back on.

00:24:46.166 --> 00:24:48.166
Reach back and find your gauge console.

00:24:48.166 --> 00:24:56.299
Run it underneath your left arm in between the BC shoulder strap and your body

00:24:56.300 --> 00:25:01.033
and then tuck it on the opposite side

00:25:01.033 --> 00:25:06.766
and then you can tighten down both of the shoulder straps on your BC.

00:25:06.766 --> 00:25:10.432
That was scuba unit: remove and replace.






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