Best Clinometers For Avalanche Assessments — Which Models?

Short answer: The best clinometers for avalanche assessments are the Suunto A-10, Suunto A-30, and the Leica Geosystems NA720, which offer high accuracy and reliability in slope angle measurements.

Clinometer Accuracy and Features

When selecting a clinometer for avalanche assessments, accuracy is crucial. The Suunto A-10 and A-30 models offer an accuracy of ±0.5° and ±2°, respectively. These Suunto clinometers are compact, lightweight, and rugged, making them ideal for use in harsh winter conditions. They also feature a high-contrast display and a built-in thermometer, which can be beneficial for temperature-related avalanche assessments. Additionally, these clinometers are designed to withstand extreme temperatures, from -20°C to 50°C.

Clinometer Angle Measurements and Techniques

Measuring slope angles in avalanche terrain requires careful technique. To minimize error, it is essential to ensure the clinometer is level and perpendicular to the slope. The Leica Geosystems NA720 clinometer is designed to facilitate accurate angle measurements, with a large, backlit display and a simple user interface. When using a clinometer, it is also crucial to understand the concept of ‘dead reckoning’, which involves combining direct angle measurements with terrain observations to accurately determine slope angles. For example, if you measure a slope angle of 35° and observe a gentle slope of 20° above the measured angle, you can estimate the total slope angle to be around 55°.

Clinometer Selection and Maintenance

When choosing a clinometer for avalanche assessments, consider factors such as accuracy, durability, and user-friendliness. Regular maintenance is also essential to ensure optimal performance. This includes checking the clinometer’s calibration and battery life, as well as cleaning the device to prevent damage from snow and ice. By selecting a high-quality clinometer and following proper maintenance procedures, you can rely on accurate slope angle measurements to inform your avalanche assessments and stay safe in the backcountry.