SDI Open Water Scuba Diver Practice Exam 2026 - Free Scuba Diver Practice Questions and Study Guide

Question: 1 / 400

What is the function of a dive computer?

To calculate underwater navigation

To monitor depth and time to prevent DCS

A dive computer serves several critical functions necessary for safe diving, with its primary role being to monitor depth and elapsed time during a dive. By doing so, it helps to calculate and manage no-decompression limits, which are essential for preventing decompression sickness (DCS). Decompression sickness occurs when a diver ascends too quickly after spending time at depths that require specific ascent protocols; thus, a dive computer continuously tracks these factors to ensure the diver adheres to safe limits.

While dive computers can provide information that aids in navigation, buoyancy control, and air supply, their foremost purpose is the monitoring of depth and time in relation to decompression protocols. This enhances a diver's safety profile by providing real-time data that can help in making informed decisions throughout the dive.

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To assist in buoyancy control

To provide air supply information

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