What is the key advantage of using Trimix for deep dives?

The key advantage of using Trimix for deep dives is that it decreases the risk of nitrogen narcosis. Trimix is a breathing gas that typically consists of three components: oxygen, nitrogen, and helium. When divers go deeper underwater, they are at a higher risk for nitrogen narcosis due to the increased pressure, which amplifies the effects of nitrogen on the body.

By incorporating helium into the mix, Trimix effectively reduces the amount of nitrogen the diver breathes. Helium does not cause narcosis to the same extent as nitrogen, thereby allowing divers to maintain better mental clarity and cognitive function at significant depths. This is crucial for managing complex dive tasks and ensuring safety during deep dives.

Other choices may touch on aspects relevant to diving but do not specifically address the critical purpose of using Trimix at depth as effectively as the reduction of nitrogen narcosis does.