Learn how water temperature, visibility, currents, and depth affect your diving. Make informed decisions about exposure protection, dive planning, and trip timing.
4 chapters
How to choose the right wetsuit or drysuit for any water temperature, from tropical reefs to cold-water wrecks.
How underwater visibility and ocean currents affect dive planning, site selection, and in-water safety — and how to make the most of both conditions.
The physiological and physical effects of increasing depth: pressure, nitrogen narcosis, gas consumption, light absorption, and safe depth limits by certification level.
A comprehensive checklist-based approach to dive trip planning: timing, gear, documentation, dive insurance, and medical considerations.