A CK-MB test may be used as a follow-up test to an elevated CK in order to determine whether the increase is due to heart damage or skeletal muscle damage.
Scuba organizations say recreational divers shouldn't go below about 130 feet, but one Egyptian diver recently ventured a bit deeper -- going more than 1,000 feet below the ocean surface and setting a world record in the process.
This was a decompression dive. There was some advanced equipment to handle the different gas mixes. There was obviously some advance training and tons of experience. If you are talking about a standard scuba diving tank filled with air, the general accepted depth limit for air is 183 feet (plus or minus).After that the oxygen content in air can become toxic (oxygen toxicity).est Answer: It really depends on your definition of no advance equipment or anything. The open circuit record is 318 meters or 1043 feet. Open circuit basically means that your exhaust bubbles go into the water. This was a 12 hour long dive just to go up and down safely.