NOAA Check Out Skills - Complete Video
Video Display Options
- Why choose?
The current state of video display on the web provides many challenges. If this website contains a YouTube video, we default to it since it is more likely to work in your choice of device/browser. That may not provide the experience you prefer, so we offer the option to choose your display: YouTube or HTML5. Please note the HTML5 video option may not work at all in some browsers/devices. If you cannot view the video you can download it from our video repository.
00:00:05.000 --> 00:00:07.000
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
00:00:49.200 --> 00:00:51.000
00:00:51.000 --> 00:00:52.566
00:00:52.566 --> 00:00:54.232
00:00:54.233 --> 00:00:56.333
use of an alternate air source,
00:00:56.333 --> 00:00:57.766
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
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
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
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.
The information provided using this web site is only intended to be general summary information to the public. It is not intended to take the place of either written law or regulations.
Neither NOAA, the OMAO, the individuals featured in the videos, nor any other party associated with the production of these videos accept responsibility for any accident or injury resulting from the use of materials contained herein.
Information in these videos is current as of the date of production. Although we try to keep this information up-to-date and accurate, neither NOAA, the OMAO, nor any agency, officer, or employee thereof warrants the accuracy, completeness, or usefulness of any information, products, or processes disclosed herein, and shall not be held responsible for any losses caused by reliance on the accuracy, reliability or timeliness of such information. Portions of such information may be incorrect or out of date. Any person or entity that relies on any information obtained from the instructional videos herein does so at his or her own risk.
The views and opinions of authors expressed on OMAO websites do not necessarily state or reflect those of the U.S. Government, and they may not be used for advertising or product endorsement purposes.
OMAO makes every effort to provide virus-free files but does not guarantee uncorrupted files.