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

Having a dive computer or depth gauge is essential for monitoring critical dive parameters such as depth, time, and no-decompression limits. The primary responsibility of a diver is to ensure their safety, which involves managing exposure to pressure, controlling ascent rates, and adhering to safe diving practices.

By tracking depth, divers can avoid exceeding recommended limits that could lead to decompression sickness. Monitoring time spent at various depths is equally important, as it helps divers stay within the no-decompression limits, thereby preventing the need for mandatory decompression stops upon ascent. The dive computer automates these calculations and gives real-time feedback, significantly enhancing safety.

Other options, while relevant to diving, do not capture the primary role of a dive computer or depth gauge in ensuring a diver's safety and adherence to necessary limits during the dive.