DMZ Scuba Training
Boyle's Law Balloon Demo
As depth increases, pressure increases by about 1 ATA every 10 m (33 ft). This makes gas spaces shrink on descent and grow on ascent.
Depth Control
Depth: 0 m1.0 ATA
~1 ATA per 33 ft / 10 m in seawater (freshwater is slightly different).
Instructor Lock: OFF
Drag the balloon in the scene, use the slider, or run presets for a consistent instructor demo sequence.
In breathing mode, each breath feels the same size, but deeper depth uses tank gas faster.
Balloon Setup
Compression mode: the balloon shrinks deeper and expands on ascent.
Think of Fully Inflate Here like your regulator supplying enough extra air molecules at depth to give a full breath.
Breathing mode: breath size stays steady while depth changes gas use rate.
Gas size now: 1.00x
Compared to surface: 1.00x
Low tank warning: breathing gas is running low.
Coach Callout
Deeper depth means higher pressure. This changes gas behavior and affects diver safety decisions.
Compression
Normal 1.00x | Now 1.00x
Ascent
No overexpansion
Elapsed Dive Time (Simulated)
00:00 / 60:00
Tank Pressure
100%
Current Gas Use Rate
1.00x of surface gas-use rate
Gas Use Proportionality
Gas use scales ~linearly with ATA: 2 ATA -> 2x, 3 ATA -> 3x, 4 ATA -> 4x (same breathing pattern).
Normal Balloon at Current Depth
1.00x of surface size
Current Balloon State
Neutral (1.00x)
Ascent Expansion
No overexpansion
Start Here
Start with a beginner walkthrough of the two key risks: overexpansion on ascent and faster gas depletion at depth.
Breathing mode diver
LEARN
Module 1 - Step 1/2
Set depth to 10 m (33 ft) and observe ATA and gas size.
Pressure
1.0 ATA
Gas Size
1.00x
Learning
Choose guided learning or sandbox mode.