When diving at altitude, up to what elevation can you increase without making adjustments?

When diving at altitude, divers need to be aware of the effects that elevation can have on their dive plans, particularly concerning the risk of decompression sickness. Generally, divers can safely dive up to a specific elevation without needing to make adjustments to their dive profiles.

In this case, the correct elevation is 300 feet. At altitudes below this level, the atmospheric pressure is still relatively comparable to sea level conditions, allowing divers to use standard dive tables or computer algorithms without modifications. Beyond this altitude, increased risks associated with lower barometric pressure necessitate adjustments to dive plans, typically in the form of modified ascent rates and time limits.

This means that while divers can ascend to 300 feet, any elevation above that threshold introduces a need for further calculations to ensure a safe dive, thereby preventing potential complications associated with altitude diving.