What criteria define an exceptional exposure dive?

An exceptional exposure dive is typically defined by the depth of the dive, which is a critical factor in assessing the risks and protocols necessary for such underwater activities. Dives deeper than 190 feet of seawater (fsw) present unique challenges and require specialized training, equipment, and safety procedures.

At this depth, divers are exposed to increased narcosis risks, more substantial physiological effects from pressure, and extended decompression obligations upon ascent. These factors necessitate a thorough understanding of advanced dive planning and the potential need for technical diving practices, including the use of mixed gases to mitigate risks associated with deeper dives.

Understanding this, the criteria that identify an exceptional exposure dive primarily hinge on the complexity and hazards associated with deep diving scenarios. The other options do not emphasize the fundamental aspects of depth and its related complications which are central to defining an exceptional exposure dive.