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the rate of ascent – the faster the ascent the greater the risk of developing DCS. The U.S. Navy Diving Manual indicates that ascent rates greater than about 20 m/min (66 ft/min) when diving increase the chance of DCS, while recreational dive tables such as the Bühlmann tables require an ascent rate of 10 m/min (33 ft/min) with the last 6 m ...
A commonly used procedure for ascent in open water when not ascending along a shot line or anchor cable is to use the more recently developed delayed surface marker buoy, or decompression buoy, inflated and deployed at the start of the ascent to notify any vessel in the vicinity of presence and location of the divers as well as helping to ...
For example, tables using Bühlmann's algorithm define bottom time as the elapsed time between leaving the surface and the start of the final ascent at 10 metres per minute, and if the ascent rate is slower, then the excess of the ascent time to the first required decompression stop needs to be considered part of the bottom time for the tables ...
The first successful ascent of a new route by any means, including aid climbing (i.e. not via free climbing). first free ascent. Also FFA. The first ascent of a new route without aid, following the free climbing criteria of a redpoint. first female free ascent. Also FFFA. The first female to complete a free ascent of a route that has already ...
In rock-climbing, a first free ascent (FFA) is the first redpoint, onsight or flash of a single-pitch, multi-pitch (or big wall), or boulder climbing route that did not involve using aid equipment to help progression or resting; the ascent must therefore be performed in either a sport, a traditional, or a free solo manner.
Emergency swimming ascent (ESA) is a free ascent where the diver swims to the surface at either negative or approximately neutral buoyancy. Exhaling ascent [3] is an ascent where the diver continuously exhales at a controlled rate during the ascent. This may apply to an emergency swimming ascent/free ascent or a controlled emengency swimming ...
The list does not include the first ascent of new routes to previously climbed mountain summits. For example, this list contains the first ascent of the summit of the Eiger in 1858, but not the more famous first ascent of the north face of the Eiger in 1938 .
A rare medieval example of mountaineering is the 1100 AD ascent of the Untersberg. The famous poet Petrarch describes his 26 April 1336 ascent of Mount Ventoux (1,912 m (6,273 ft)) in one of his epistolae familiares, claiming to be inspired by Philip V of Macedon's ascent of Mount Haemo. [14] [15]