Overhead Environment
Definition
An overhead environment is any dive setting where a direct vertical ascent to the surface is obstructed, such as caves or wrecks.
More on Overhead Environment
Overhead environments include caves, caverns, wreck interiors, ice dives, and even overhangs or tunnels. They limit exit options and complicate emergency responses. Specialized training is required to navigate these settings safely. Divers must carry redundant air supplies, reels, and lighting systems. Proper planning and situational awareness are critical to avoid getting lost, silted out, or running out of air.
Frequently Asked Questions
Caves, shipwreck interiors, ice diving sites, and tight swim-throughs with no direct ascent path.
No. You need specialized training in cave, wreck, or technical diving to enter overhead spaces safely.
You can’t ascend directly to the surface in an emergency. Air management, line usage, and navigation are critical.
Redundant regulators, reels, backup lights, guideline markers, and sometimes full-face masks or side-mount systems.
They use guideline reels and always maintain contact with the line. Backup plans and team communication are essential.