What are "no-decompression limits"?

The concept of "no-decompression limits" refers to the maximum amount of time a diver can remain at a specific depth without the need to make mandatory decompression stops during their ascent to the surface. When divers stay within these limits, they can ascend directly to the surface without risking decompression sickness, also known as "the bends."

These limits are determined by factors such as depth and the duration of the dive, and they are critical in planning safe diving activities. If a diver exceeds these limits, they must pause at certain depths to allow dissolved gases in their body to safely off-gas, which helps to prevent harmful nitrogen bubbles from forming in their tissues and bloodstream. Hence, understanding and adhering to no-decompression limits is vital for safe diving practices.

Other options address aspects of diving safety but do not accurately define no-decompression limits. The maximum depth a diver can reach without equipment pertains to a different aspect of diving capability. The minimum amount of air a diver must carry relates to dive planning and safety but does not define no-decompression limits. Finally, the maximum depth allowed for recreational diving does not specifically relate to the concept of no-decompression limits, as divers can have varying depths they can reach depending on certification and conditions.