PADI Divemaster Certification Practice Exam

Which of the following factors primarily differentiates dive computers from dive tables?

1. The type of diver's certification required

2. The validity and reliability of decompression models

3. The depth range they are suitable for

4. The default settings for temperature adjustment

The correct answer is: The validity and reliability of decompression models

The primary factor that differentiates dive computers from dive tables is the validity and reliability of decompression models. Dive tables are based on predetermined models that outline no-decompression limits and varying levels of exposure to pressure, being static and not taking into account real-time data specific to each dive. Dive computers, on the other hand, utilize real-time data, such as the diver's current depth, time at depth, and ascent rate, along with more advanced algorithms that continuously calculate and adjust no-decompression limits based on these factors throughout the dive. This adaptability makes dive computers significantly more reliable for managing decompression, as they can reflect the actual conditions encountered during the dive instead of relying solely on fixed tables. While the type of diver's certification, depth range suitability, and default temperature settings can have their respective implications for dive planning and safety, they do not fundamentally alter how decompression is approached or calculated between the two methods. The focus on decompression modeling is crucial since it directly impacts diver safety and the ability to manage potential decompression sickness.