What is an important step to take when using computers on deep dives?

When engaging in deep dives, one critical step is to read the instructions for the dive computer being used. Each dive computer has specific features, functions, and limits that divers need to understand to ensure safe diving practices. Familiarity with the computer's interface, settings, and alarm system can help divers avoid potential problems related to depth and time limits. By reading the instructions, divers can make informed decisions about how to manage their dive plan, including monitoring critical variables such as no-decompression limits.

While other options like resetting alarms, sharing data with buddies, and making occasional checks carry significance in specific contexts, understanding how to properly use the dive computer through its instructions lays the foundation for safe and effective diving. Knowing the operational details ensures that divers can respond appropriately to alarms and guidance given by the device during the dive.