Additional features common to many dive computers include all of the following except:

Additional features common to many dive computers include all of the following except:

• A. The ability to display dive log data and to upload that data to a laptop or desktop computer.
• B. The ability to monitor a diver's exposure to air, Nitrox and Trimix.
• C. The ability to project no-decompression limits for upcoming dives.
• D. Bar graphs that provide a visual representation of a diver's exposure to nitrogen and other gasses.

Answer: (B)

Dive computers share several common features: they display and store dive data for later review, they project no-decompression limits for planned dives, and they often use visual bars to show nitrogen loading or gas exposure so you can gauge how stressed your tissues are. They also handle multiple gas mixtures and adjust calculations like no-decompression limits and oxygen exposure based on the gas you’re breathing. What isn’t a standard feature across many computers is tracking your exposure to three different gas types—air, Nitrox, and Trimix—as a single, comparable metric. Air is simply the baseline breathing gas, and while a computer may switch between Nitrox or Trimix and compute PPO2 and CNS exposure for the gas you’re on, it doesn’t typically provide a universal “exposure to air, Nitrox and Trimix” gauge. That kind cross-gas exposure metric isn’t a common, built-in function, which is why that choice is the exception.

Dive computers share several common features: they display and store dive data for later review, they project no-decompression limits for planned dives, and they often use visual bars to show nitrogen loading or gas exposure so you can gauge how stressed your tissues are. They also handle multiple gas mixtures and adjust calculations like no-decompression limits and oxygen exposure based on the gas you’re breathing.

What isn’t a standard feature across many computers is tracking your exposure to three different gas types—air, Nitrox, and Trimix—as a single, comparable metric. Air is simply the baseline breathing gas, and while a computer may switch between Nitrox or Trimix and compute PPO2 and CNS exposure for the gas you’re on, it doesn’t typically provide a universal “exposure to air, Nitrox and Trimix” gauge. That kind cross-gas exposure metric isn’t a common, built-in function, which is why that choice is the exception.