What type of environment should divers be cautious of when navigating wrecks?

Navigating wrecks often involves an array of hazards, and restricted passages present significant risks for divers. Restricted passages can include tight openings, narrow corridors, or areas that limit maneuverability. This environment can be particularly challenging because it increases the possibility of entrapment, reduced visibility, and potential encounters with sharp or unstable objects.

When divers enter restricted passages, they need to be mindful of their buoyancy control and equipment, as any sudden movement could lead to entanglement or injury. Additionally, limited space can hinder the diver's ability to quickly exit the area in case of an emergency. Thus, special training, preparation, and caution are vital when exploring wrecks with such environments to ensure diver safety.

Other external factors such as choppy waters, clear weather, and low tide areas do not inherently pose the same level of immediate danger associated with navigating reduced spaces within wrecks. While they may have their own considerations, the constraints imposed by restricted passages are specifically deserving of heightened caution during wreck diving.