No Widgets found in the Sidebar

## What Does GTS Mean in Scuba Diving?

**Glossary of Scuba Diving Terms**

GTS stands for “Gas Time to Surface” and refers to the amount of time it takes to ascend to the surface of the water while ascending at a safe rate. It is calculated based on the depth of the dive, the diver’s breathing rate, and their decompression profile.

**How GTS is Calculated**

GTS is typically calculated using a dive computer or a dive table. Dive computers automatically calculate GTS based on the diver’s depth, elapsed time, and breathing rate. Dive tables provide pre-calculated GTS for various depths and ascent rates.

**Importance of GTS**

GTS is crucial for safe scuba diving as it provides divers with the necessary information to avoid decompression sickness (DCS). DCS occurs when a diver ascends too quickly, causing nitrogen bubbles to form in their body. These bubbles can block blood vessels, leading to serious health issues.

**Factors Affecting GTS**

* **Depth of the dive:** Deeper dives require longer GTS due to the higher pressure at depth, which results in increased nitrogen absorption.
* **Diving time:** Longer dives consume more breathing gas, reducing the diver’s gas supply for the ascent.
* **Diver’s breathing rate:** Divers who breathe more quickly consume more gas, reducing their GTS.
* **Decompression profile:** Diving involves mandatory decompression stops at certain depths to allow the body to release dissolved nitrogen. These stops increase the GTS.

**Determining GTS**

* **Dive computer:** Modern dive computers provide real-time GTS calculations during the dive.
* **Dive table:** Refer to the GTS table for the specific depth and ascent rate of the planned dive.
* **Rule of thumb:** As a general rule of thumb, a GTS of at least twice the maximum depth is recommended to minimize the risk of DCS.

**Additional Tips for Safe Ascent**

* **Ascend slowly:** Follow the recommended ascent rate to avoid exceeding the safe GTS.
* **Make safety stops:** Observe appropriate decompression stops to allow nitrogen to escape from the body.
* **Monitor buoyancy:** Maintain neutral buoyancy during the ascent to prevent uncontrolled ascents.
* **Check gauges regularly:** Monitor the dive computer and depth gauge to ensure you are within the safe GTS limit.
* **Do a safety stop:** Always make a safety stop of at least 3 minutes at 5 meters (15 feet) before surfacing.


GTS is a critical concept in scuba diving that helps prevent decompression sickness. By understanding GTS and following safe ascent procedures, divers can enjoy their underwater adventures safely and responsibly.

Read More  How much for scuba diving certification

Leave a Reply

Your email address will not be published. Required fields are marked *