SDI Open Water Scuba Diver Practice Exam 2025 – Complete Test Prep

Question: 1 / 400

What is the purpose of the tank pressure gauge?

To measure the temperature of the tank

To keep track of dive duration

To provide feedback on the remaining air supply

The tank pressure gauge serves a critical role in scuba diving by providing feedback on the remaining air supply in the tank. It enables divers to monitor how much air they have left during a dive, which is essential for planning safe ascents and ensuring that they do not run out of air while underwater. By frequently checking the gauge, divers can make informed decisions regarding their dive duration and any necessary safety stops, thereby enhancing their overall safety.

For a diver, understanding how much air is left is crucial for maintaining adequate air supply for breathing, especially as they approach the end of their dive. This gauge typically displays pressure in PSI (pounds per square inch) or bar, allowing the diver to clearly see when it's time to begin ascending or to initiate their safety procedures.

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To indicate underwater visibility

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