Techniques commonly used to navigate under water include:

Techniques commonly used to navigate under water include:

• A. Natural navigation.
• B. Computer navigation.
• C. Compass navigation.
• D. Both the first and third answers are correct.

Answer: (D)

The main idea being tested is how divers determine direction underwater using practical methods. Two techniques you’ll rely on regularly are natural navigation and compass navigation. Natural navigation means reading the environment—recognizing reef shapes, rock formations, sand patterns, and other telltale features, plus understanding how current and terrain change as you move. These cues help you orient yourself and estimate distances, which is especially useful in familiar areas or when devices aren’t available. Compass navigation uses an underwater compass to maintain a fixed heading, follow a planned course, and backtrack to your entry point. The compass provides a reliable reference when natural cues are sparse or confusing, making precise navigation possible. Computer navigation isn’t a standard standalone method underwater because GPS doesn’t work below the surface and many dive computers don’t provide real-time steering guidance. They may assist with planning or logging, but they don’t replace the need for natural cues and a compass. So, the techniques commonly used are natural navigation and compass navigation.

The main idea being tested is how divers determine direction underwater using practical methods. Two techniques you’ll rely on regularly are natural navigation and compass navigation. Natural navigation means reading the environment—recognizing reef shapes, rock formations, sand patterns, and other telltale features, plus understanding how current and terrain change as you move. These cues help you orient yourself and estimate distances, which is especially useful in familiar areas or when devices aren’t available.

Compass navigation uses an underwater compass to maintain a fixed heading, follow a planned course, and backtrack to your entry point. The compass provides a reliable reference when natural cues are sparse or confusing, making precise navigation possible.

Computer navigation isn’t a standard standalone method underwater because GPS doesn’t work below the surface and many dive computers don’t provide real-time steering guidance. They may assist with planning or logging, but they don’t replace the need for natural cues and a compass.

So, the techniques commonly used are natural navigation and compass navigation.