Question about Scuba Diving & Snorkeling

What does the law of buoyancy mean - Scuba Diving & Snorkeling

Posted by on

marco scafidi

• Level 1:

An expert who has achieved level 1.

MVP:

An expert that gotÂ 5 achievements.

Habit-Forming:

Visited the website for 3 consecutive days.

New Friend:

An expert that has 1 follower.

• Contributor

The law of buoyancy is the principle that describes why some objects float over water and some others sink: when you put something in water, it receives an upword force equal to the weight of the water it displaces.
this is important in diving in many ways.. and in particular, in diving, you always want to have a neutral buoyancy: this means that if you are standing still in water and you have a neutral buyoancy, you don't sink nor come back to surface

you have a neutral buoyancy if you "displace" always the correct volume of water.. in other words, you always need to occupy about the same volume: if you go in deep water, the water pressure will "reduce" your volume, so to mantain a neutral buoyancy you have to inflate air in your buoyancy compensator jacket to expand its volume.
otherway, if you're coming back to surface, pressure reduces and your body occupies more volume, so you have to deflate your jacket.

Posted on Jul 30, 2017

×

my-video-file.mp4

Complete. Click "Add" to insert your video.

×

Related Questions:

Blue-sky Laws

this is a Cars & Trucks answer blog not financial investments!?

Dec 27, 2015 | Cars & Trucks

Is the word "dhimmitude "included in the Health Care law? Page 107?

dhimmitudeis on page 107 of the health care law and means muslims are specifically exempt from from the government mandate to purchase insurance
the word is not in health care law
go google --type in polifact.com and read all about what is happening with muslims being exempt from health insurance.

Feb 11, 2015 | Computers & Internet

What is the diffrence between the assosiative property and the communitive property in math???

The "Commutative Laws" just mean that you can swap numbers over and still get the same answer when you add, or when you multiply.
The "Associative Laws" mean that it doesn't matter how you group the numbers (ie which you calculate first) when you add, or when you multiply.

Jan 18, 2012 | Health & Beauty

I have a bought a second hand mares 1000 mrs bcd and upon receipt have noticed one of the chest/shoulder clips has been stitched on the wrong way round ( back to front). This means that to wear the clip...

You are correct, the buckle will need to be removed and put back on the correct way. Shouldnt cost that much, I had a buckle replaced by a local shop/laundrette that did repairs, was only a few GBP. Hope that helps

Oct 17, 2010 | mares JUBILEE Buoyancy Compensator

Dacor/Mares Airtrim

Hi,

Which deflate?? Could just be it needs a service.. Has it had one recently??

Jul 16, 2009 | mares JUBILEE Buoyancy Compensator

Sound driver

What does a computer driver have to do with Scuba Diving?

Jun 09, 2009 | mares JUBILEE Buoyancy Compensator

What is the proper way to install a valve into a scuba tank?

Any preesurised gas container should be visually inspected annually (at least) and pressure tested every 5 years, 3 years or annually according to local law. If you are going to have it tested, screw the valve in loosely as they will need to examine the threads on it in order to pass the tank and valve as a unit. BUT ALL THAT ASIDE, the answer to your original question is: Replace the tank neck O-ring, very lightly lube the threads of the valve with a SCUBA silicon grease, wind the valve in to finger tight (if you have a torque wrench you could find out setting) if no torque wrench, nip the valve tight with a light tap from a rubber mallet on a 12" wrench (I know it is a bit approximate, but the O-ring makes the seal, not the tightness)

Dec 01, 2008 | Aeris Atmos Lx BC

Related Topics:

2,008 people viewed this question

Usually answered in minutes!

Level 3 Expert

Level 3 Expert