Excerpts from Jeff Goodman’s Book Action Camera Underwater Video Basics, Part 4 of 6: Pre-Dive Equipment Checks

Pre-dive equipment checks are essential for successful underwater filming. Check for dirt or sand in the O-ring to avoid leaks. Make sure all batteries are charged and have spare ones. Ensure lens ports are clean and memory cards are empty or formatted. O-rings must be clean and free of damage; always have spares. Properly seal your equipment to prevent water entry.