You can use this website to plan your dive. For the first dive you will need to enter max depth and time. If you want to plan subsequent repetitive dives, you will have to enter the Surface Interval time so that the software can calculate your Pressure Group at the end of the first dive and at the end of the Surface Interaval. The software will help you calculate the No Decompression Limit for repetitive dives at the desired depth.

The image shows the inputs and outputs of this page.

Needless to say that scuba diving is an extreme sport and you need to be qualified to go diving.

 This script assumes that you are starting your dive planning without any residual Nitrogen from previous dives in your body. This assumption is correct as long as this is your first dive for at least 24 hrs, it it not at altitude and you have not been flying in the last 24 hrs.

To validate that this page produces correct results you can use the resources below

• click here to see the validation table 1

• click here to see the validation table 2

• click here to see more worked examples

• click here to see worked examples (external site)