What is one disadvantage of using helium in mixed gas diving?

Using helium in mixed gas diving indeed has the disadvantage of making divers get colder faster. This occurs because helium has a lower thermal conductivity compared to nitrogen, which means that it can carry away body heat more rapidly. As divers ascend to deeper depths, they are exposed to higher pressure environments, which can also exacerbate the heat loss due to the properties of helium. This is particularly important for divers to consider when they are planning dives, as maintaining body temperature is crucial for comfort and safety while underwater.

Understanding this potential drawback helps divers in planning their dives, as they may need to use thicker suits or other thermal protection measures to counteract the increased heat loss associated with breathing helium. This knowledge enhances a diver's ability to manage risks and prepare adequately for their diving experience.