Decompression Table

Definition - What does Decompression Table mean?

A Decompression Table is a set of instructions that describes a profile of ascent rates and breathing mixtures to divers in the ocean. It helps them in safely reducing the high ocean pressure after dive equivalent to the atmospheric pressure that they observe on land. The decompression table contains information about the:

  • Sea Depth
  • Bottom time
  • Decompression stops
  • Total decompression times

Petropedia explains Decompression Table

In offshore oil and gas applications, many a times people have to dive in so as to repair the equipment placed at the bottom of the ocean floor. While diving into deep water, the divers have to get into a decompression submarine or any other equipment that holds up the oxygen inside the chamber. Divers also have to perform saturation diving techniques that help divers reduce the decompression sickness when they dive into deep depths.

The divers have to go through the decompression tables which are much needed to compute the pressure of the chamber of the diving vehicle they will use. The pressures can range from 0 to 14 pounds and from 14 to 50 pounds per square inch gauge inclusive by 2-pound increments and for exposure times for each pressure extending from one-half to over 8 hours inclusive.

In between the chamber also needs to be decompressed several times; hence the decompression has to be conducted to a maximum of four stages. The maximum four-stage decompression is required when the working chamber pressure of 40 pounds per square inch gauge or over is needed.

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