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.
The Deepest Dives With the right training, equipment and breathing gas, scuba dives have been made to great depths. The current record for an open circuit scuba dive performed round trip from the surface is 318M (1042 feet).This dive required over 8 hours of decompression stops during the ascent.he Longer Answer-Pretty Darned Deep Scuba diving, however, is not limited to recreational diving. Self Contained Underwater Breathing Apparatus (SCUBA) allows technical and commercial diving to depths well in excess of 130 feet. Humans reach a physiological limit of about 210 feet using normal air as a breathing gas.