How to utilize altimeters when navigating in low-visibility conditions?

Calibrating and Reading the Altimeter

Before using an altimeter, it’s essential to calibrate it to ensure accurate readings. To do this, set the altimeter to the current elevation of a known landmark, such as a mountain peak or a high point on a map. This helps the altimeter compensate for variations in atmospheric pressure. Once calibrated, set altimeter mode to “baro” or “pressure” to start tracking your elevation gain or loss.

Navigating with Altimeter Readings

When navigating in low-visibility conditions, use your altimeter to determine your current elevation and adjust your course accordingly. Aim for a steady elevation gain or loss to maintain a consistent bearing. For example, if you’re descending and your altimeter shows a rapid loss of elevation, adjust your course to ensure you’re on track and avoid obstacles. Use your altimeter in conjunction with a map and compass to stay oriented and navigate safely.

Using Altimeter Data to Avoid Obstacles

In low-visibility conditions, it’s crucial to use altimeter data to avoid obstacles. If your altimeter shows a sudden change in elevation, such as a steep drop or a sudden rise, adjust your course to avoid potential hazards. For example, if your altimeter shows a rapid loss of elevation, be aware of potential drop-offs or cliffs ahead. Use your altimeter to stay alert and adapt to changing terrain conditions.