DIVING GLOSSARY · Equipment
SPG
Submersible pressure gauge: an instrument that indicates cylinder pressure.
Explore the idea in context
Definitions are a starting point. These lessons connect the word to examples, illustrations and further reading.
Know your equipment
Gauges and units
Distinguish cylinder pressure from depth.
Read lesson →Diving with a buddy
Gas awareness and the shared plan
Understand why gas information belongs in training and planning.
Read lesson →Introductory definition · Instructor review pending.