leadweight
Contributor
In the current issue of Rodales there is a graph showing varying NDL times for several popular computers. In the profile (second dive of the day) after 35 minutes and a maximum depth of 70 feet the divers have returned to 40 feet. Computers made by Suunto, Mares (and some others) show NDL of about 9 minutes. Uwatec computers have about 22 minute NDL and Oceanic/Aeris computers have an amazing 60 minute NDL. The divers then ascend within 10 minutes and none of the computers are violated.
On a profile like this a lot of divers would have enough air left to hang around at 40 feet for 15 minutes or so. This would put some of these computers into deco. A diver with an Oceanic/Aeris would surface at 60 minutes and not be anywhere near violating his computer.
There are tons of Oceanic/Aeris computers in use, yet relativey few divers get bent. Why?
Some possibilities:
1. The more conservative computers are unnecessarily conservative by a gross amount.
2. Most divers using the less conservative computers are actually staying within the NDL's of the more conservative computers because they are low on air, cold or their divemaster wants to eat lunch.
3. Divers with greater risk factors are self selecting by purchasing the more conservative computers while mainly the young and in-shape buy the less conservative computers.
Anyone know the answer? I don't.
On a profile like this a lot of divers would have enough air left to hang around at 40 feet for 15 minutes or so. This would put some of these computers into deco. A diver with an Oceanic/Aeris would surface at 60 minutes and not be anywhere near violating his computer.
There are tons of Oceanic/Aeris computers in use, yet relativey few divers get bent. Why?
Some possibilities:
1. The more conservative computers are unnecessarily conservative by a gross amount.
2. Most divers using the less conservative computers are actually staying within the NDL's of the more conservative computers because they are low on air, cold or their divemaster wants to eat lunch.
3. Divers with greater risk factors are self selecting by purchasing the more conservative computers while mainly the young and in-shape buy the less conservative computers.
Anyone know the answer? I don't.