Information and Tips for Flying Altitude Events with Altimeters
NAR Altitude Contest Events typically use commercially available electronic altimeters for determining altitude. the article at the link below provides helpful information for flying altitude events with altimeters.
Care and Feeding of Altimeters
The Adrel ALT-BMP altimeter (aka the North Coast Adrel MaxAlt) requires special instructions to obtain an accurate altitude for use in NAR Competition. See more info at the link below.