What is the first step in using a dive computer correctly?

The first step in using a dive computer correctly is to read the manufacturer's manual. This is essential because the manual contains specific information on how the dive computer operates, its features, and functions, including how to set it up for various types of diving. Each dive computer can have unique settings and capabilities, and familiarizing yourself with the manual ensures that you understand how to use it effectively and safely during your dives. Additionally, the manual will provide important details about maintenance, battery life, and how to interpret the data it presents while you are underwater. This foundational knowledge is critical for preventing errors that could impact your safety and diving experience.