You may make a safety stop at the end of any dive, and in fact, you should consider it a standard practice on virtually all your dives. However, consider a safety stop required if:

  • Your dive has been to 30 metres/100 feet or deeper.
  • Your pressure group at the end of the dive is within three pressure groups of the no decompression limit on the RDP.
  • You reach any limit on the Recreational Dive planner or your dive computer. With a dive computer, this would be if your computer shows zero NDL time remaining at any point in the dive.

When using the RDP, in these circumstances the safety stop is considered required.
You may wonder whether you need to account I for safety stop time when using the RDP. You don't need to add safety stop to your bottom time when using the Recreational Dive Planner. A computer will process safety stop time automatically.

Keep in mind that, although you should make safety stops a regular procedure for all your dives, it's optional under circumstances such as very low air (due to unforeseen circumstances during the dive), assisting another diver, or rising bad weather make it more important to get to the surface immediately.

Emergency Decompression
You plan your dive as a no decompression dive but emergency decompression stop to allow your body to eliminate nitrogen; without this stop, you face an unacceptable of DCS when you surface.