Which data must be entered into dive planning software to generate a dive profile?

To generate a dive profile using dive planning software, it is essential to input multiple parameters that collectively inform the profile's integrity and safety. These parameters include dive depth, gas type, and dive time.

Dive depth is crucial as it determines the pressure the diver will experience at various points underwater, which in turn influences nitrogen absorption and decompression limits. Gas type matters because different gases have varying effects on divers, particularly regarding their narcotic properties and the possibility of oxygen toxicity, especially at greater depths. Dive time is also vital as it directly affects the accumulation of nitrogen in the body and the necessary decompression stops during ascent.

When all three parameters—dive depth, gas type, and dive time—are entered into the software, it enables the generation of a comprehensive and accurate dive profile that reflects safe diving practices, including necessary decompression stops. Therefore, the option indicating that all pieces of data must be included is correct, as each plays a critical role in ensuring diver safety and adherence to proper dive planning protocols.