Which of the following is a common misconception about dive computers?

The statement regarding dive computers being less expensive than using tables reflects a common misconception. In reality, while dive computers can simplify the diving experience by providing real-time data and calculations, their initial cost is often higher than using traditional dive tables. Many divers consider the investment in a dive computer worthwhile for the convenience, ongoing calculations as dives progress, and the ability to track multiple dives more accurately.

Understanding the context of dive tables is important as they are a traditional method that involves manual calculations and tables to determine no-decompression limits and safety stops. However, dive tables themselves have minimal upfront costs, and while they may be less convenient, they do not typically provide the dynamic data that computers offer.

The other options highlight real characteristics of dive computers, such as their reliability compared to tables and their inability to measure the actual nitrogen in the body, which further emphasizes the importance of understanding the purpose and functionality of dive computers in enhancing safety and dive planning.