GUE - Fundamentals - Gas Management & Buoyancy Flashcards
Why is good buoyancy important?
It supports diver safety.
It reduces effort required whilst diving.
It increases the enjoyment of diving.
It reduces gas consumption.
It allows longer bottom times.
What is the PRIMARY means of adjusting your buoyancy?
Buoyancy Compensator or Wing.
What should a diver do with his / her lungs while diving?
Breathe in the middle of the lungs when neutrally buoyant.
Take a deeper breath in to make him / herself positively buoyant.
Take a longer breath out to make him / herself negatively buoyant.
Where is the inflator button for the diver’s BC located when using the GUE equipment configuration?
On the left side of the diver close to the end of the corrugated hose that runs over the top of the left shoulder.
Why is it better to use the OPV for dumping gas from your wing?
It allows a diver to dump gas whilst remaining in trim.
It allows a diver to use the fins for propulsion whilst dumping gas.
How should gas be added to the diver’s BC system?
Slowly, adding small amounts of gas at a time and waiting 1 - 2 breathing cycles to monitor the effect of the added gas.
How can gas be dumped from the diver’s BC system?
Through the corrugated inflator hose.
and
Using the rear dump valve situated on the left side of the wing.
How should changes to buoyancy using your breathing and buoyancy device be carried out?
Slowly and in a controlled manner.
A diver’s body position in the water (trim) also helps their buoyancy.
True
It is important to make the dump valve the highest point on the BC to effectively dump gas. A diver can alter his or her body position in the water to do this.
True
Why is good buoyancy control important? Select the correct options.
It adds to diver safety.
It reduces gas consumption.
It reduces the impact on the environment.
It adds to the enjoyment of diving.
Neutral buoyancy should primarily be achieved using:
The wing.
What tools are available to the diver for fine tuning buoyancy?
The lungs. A diver can take a large breath in to account for negative buoyancy and a large breath out for positive buoyancy. The wing should then be used to regain true neutral buoyancy.
Propulsion. A diver can use kicks to mitigate negative or positive swings in buoyancy.
Why is it preferable to use the OPV of a diver’s wing for venting gas?
It requires less changes to the diver’s body position and allows a diver to remain in trim. This aids stability.
Why is it useful to be able to convert between pressure and volume?
To work out how much gas we have in our cylinders.
So that we can work out how much gas we need at a given depth for a specified period of time.
So that we can work out what pressure we need in our cylinders to give us a defined volume of gas.
