What advantage do dive computers have over dive tables that relates to no-decompression limits?

What advantage do dive computers have over dive tables that relates to no-decompression limits?

• A. They account for multilevel planning.
• B. They provide unlimited bottom time.
• C. They eliminate the need for ascent rate monitoring.
• D. They automatically rescue you.

Answer: (A)

Multilevel planning is the advantage being tested. A dive computer continually tracks depth and time and recalculates your remaining no-decompression time as you move through different depths. This lets you structure a dive with multiple depth levels (going deeper for portion of bottom time, then ascending to shallower depths) without exceeding no-decompression limits. Dive tables, by contrast, require planning around a single maximum depth and a fixed bottom time, which makes real-time adjustments for depth changes less flexible and often more conservative. So, the computer’s real-time, depth-profile calculations optimize your bottom time across multiple levels, rather than being tied to a single depth. The other options aren’t accurate: no-decompression limits are not unlimited, ascent rate monitoring is still needed even with a computer, and diving computers do not rescue you.

Multilevel planning is the advantage being tested. A dive computer continually tracks depth and time and recalculates your remaining no-decompression time as you move through different depths. This lets you structure a dive with multiple depth levels (going deeper for portion of bottom time, then ascending to shallower depths) without exceeding no-decompression limits. Dive tables, by contrast, require planning around a single maximum depth and a fixed bottom time, which makes real-time adjustments for depth changes less flexible and often more conservative.

So, the computer’s real-time, depth-profile calculations optimize your bottom time across multiple levels, rather than being tied to a single depth. The other options aren’t accurate: no-decompression limits are not unlimited, ascent rate monitoring is still needed even with a computer, and diving computers do not rescue you.