What is the primary purpose of using a dive slate?

The primary purpose of using a dive slate is to communicate important information underwater. In the underwater environment, verbal communication is not possible due to the use of scuba gear and the surrounding water. Therefore, divers utilize dive slates, which are typically reusable boards with a writing surface, to convey messages to each other. This can include important reminders, safety instructions, or even simple notes about observations during the dive.

While a dive slate can also assist in recording dive logs, measuring depth, and tracking time, these functions are secondary. Recording dive logs is generally done after the dive, and other tools or devices, such as dive computers or watches, are more appropriate for measuring depth and tracking time accurately. The core function remains communication, ensuring that divers can effectively coordinate their actions and share information in situations where verbal cues are not possible.