What is nd time in diving?
The “no-decompression limit” (NDL) or “no-stop limit” , is the time interval that a diver may theoretically spend at a given depth without having to perform any decompression stops while surfacing.
How long should a decompression stop be?
3 to 5 minutes
While a safety stop is always carried out at 15-20 feet for 3 to 5 minutes a decompression stop varies based on the depth and time the diver spent at a particular depth, and that diver would perform a Deco Stop and a Safety Stop at 5m (15ft).
What are ND limits?
A no-decompression limit is the maximum time that a diver can spend underwater and still ascend directly to the surface without the need for decompression stops.
How long can you scuba dive at 60 feet?
A not uncommon 2 tank dive trip might be the first dive at a max of 90 feet with a max time underwater of 35 minutes while the second dive might have a profile of max depth of 60 feet with a max time underwater of 50 minutes.
How long can you dive without decompression?
Shallow dives can require a decompression when they are long, however. A two-hour cave exploration dive may not exceed 60 to 100 feet, but the dive is well beyond the no stop limits.
What is a no stop limit scuba dive?
No Stop Limit for Recreational Scuba Diving. No decompression diving (No stop diving) refers to “diving that you can always ascend directly to the surface without stopping, yet without significant risk of decompression sickness” (according to PADI Open Water Manual).
What is the no-stop time for 60 feet diving?
The NDL or No-Stop time for 60 feet / 18 meters is 56 minutes according to the Recreational Dive Planner. On a Suunto dive computer using their algorithm, the NDL is 51 minutes for your first dive. Regardless of which branded computer or dive table, you are using, always go with the most conservative and lowest number.
How long can you dive without a decompression stop?
Shallow dives of 6-10 metres (20-30 feet) you can spend over 200 minutes without a decompression stop. Dives to over 30 metres (100 feet) limit your dive time to around 20 minutes before a decompression stop is required.
When should a diver reduce his maximum dive time?
A diver should reduce his maximum dive time if he is exhausted, sick, stressed or dehydrated. He should also shorten his maximum dive time if he has dived many days in a row, is diving in cold water or will be physically exerting himself underwater.