Final answer:
A diver experiencing "rapture of the deep" or nitrogen narcosis could feel impaired or euphoric, both of which are dangerous while diving. To prevent DCS, divers should ascend slowly and make decompression stops; if afflicted, hyperbaric oxygen therapy may be required.
Step-by-step explanation:
When a diver gets "narked" at depth due to nitrogen narcosis, also sometimes referred to as "rapture of the deep," they may experience symptoms similar to alcohol intoxication, such as impaired judgment and coordination. Alternatively, the diver may feel a sense of euphoria. Both of these effects can be potentially hazardous as they impair a diver's ability to make safe decisions under water.
Preventing Decompression Sickness
To avoid decompression sickness (DCS), it's crucial for divers to ascend from increases in depth at measured speeds, no faster than 10 or 20 meters per minute. Additionally, divers should make several decompression stops, where they pause for several minutes at specific depths during the ascent. If these preventative measures are not successful, divers affected by DCS may require hyperbaric oxygen therapy in decompression or recompression chambers as treatment.