Safety

Dive safety disclaimer

Depthlog is a utility tool for planning and logging dives. It is not a dive computer, it is not ground truth, and it does not replace your training, your agency tables or your instructor.

Never plan or run a dive on Depthlog alone

The numbers in Depthlog are estimates produced by recreational dive tables. Always plan and execute your dives with a dive computer, within your training, and according to the tables and regulations of your certification agency.

What Depthlog is

Depthlog is a utility tool for recreational divers. It helps you log your dives, keep your certificates, map and statistics in one place, and estimate planning values such as residual nitrogen (RNT), pressure groups, no-decompression limits, equivalent air depth and oxygen exposure.

It is useful for planning and for tracking your diving over time, and it is built to be fast and clear on a boat. That is all it is.

What Depthlog is not

It is not a substitute for a certified dive course, an instructor, or your own training.
It is not a dive computer and it does not run a tissue model such as Bühlmann.
It is not a medical, physiological or safety authority, and nothing in it is medical advice.
It is not ground truth. Its values can differ from your computer, your agency tables and real conditions.

The FIPSAS recreational dive tables

Depthlog uses the recreational air dive tables published by FIPSAS as its nitrogen reference. The front and back of the tables are shown below. Tap the table to flip it, and download either side if you want to keep them with you.

Download front Download back

Tap the table to flip it. Both sides are available to download.

How Depthlog reads the table, and the interpolation

Printed tables only publish a value for each listed depth. The school method is to round up to the next listed depth, which is conservative. Depthlog instead interpolates linearly between the two nearest listed depths, which is closer to how a dive computer behaves, and rounds the result up to the next whole minute.

Real example

The FIPSAS table gives these no-decompression limits:

18 m: 63 minutes
21 m: 48 minutes

For a dive at 20 m, Depthlog interpolates between the two:

63 + (48 - 63) * (20 - 18) / (21 - 18) = 53 minutes

The school method would round 20 m up to the 21 m column and use 48 minutes. Interpolation gives a result closer to a computer, but it is still a table approximation, not a tissue model.

Diving is dangerous

Scuba diving is a physically demanding sport with inherent risks, including decompression sickness, arterial gas embolism, barotrauma and, in the worst case, death. Those risks exist regardless of the tools you use.

Depthlog and its authors are not responsible and accept no liability for any damage, injury, illness or death to any diver or third party, or for any property loss, arising from the use of, or reliance on, the information provided by this application. You dive at your own risk and under your own responsibility.

Always dive with a computer

Always dive with a functioning dive computer, and always follow it. Set the conservatism or gradient factors of your computer based on your own experience, your physical condition and your training, and do not push those settings beyond what you are trained to handle.

Always dive within your certification, keep a controlled ascent, respect your no-decompression limits and follow your agency standards.

In summary

Depthlog is a utility tool to help you plan and log your diving. It is not correct, and never safe, to plan a dive through Depthlog alone. Use it together with your training, your agency tables and your dive computer.

Read the full Terms of Service and the Privacy Policy.