Garmin D2 Mach 1 Owners Manual PDF - Page 63

• Hold the arm wearing the watch at heart level while the watch reads your blood oxygen saturation. • Use a silicone or nylon band. • Clean and dry your arm before putting on the watch. • Avoid wearing sunscreen, lotion, and insect repellent under the watch. • Avoid scratching the optical sensor on the back of the watch. • Rinse the watch with fresh water after each workout. Compass The watch has a 3-axis compass with automatic calibration. The compass features and appearance change depending on your activity, whether GPS is enabled, and whether you are navigating to a destination. You can change the compass settings manually (Compass Settings, page 55). Setting the Compass Heading 1 From the compass glance, press START. 2 Select Lock Heading. 3 Point the top of the watch toward your heading, and press START. When you deviate from the heading, the compass displays the direction from the heading and degree of deviation. Compass Settings Hold MENU, and select Sensors & Accessories > Compass. Calibrate: Allows you to manually calibrate the compass sensor (Calibrating the Compass Manually, page 55). Display: Sets the directional heading on the compass to letters, degrees, or milliradians. North Ref.: Sets the north reference of the compass (Setting the North Reference, page 55). Mode: Sets the compass to use electronic-sensor data only (On), a combination of GPS and electronic-sensor data when moving (Auto), or GPS data only (Off). Calibrating the Compass Manually NOTICE Calibrate the electronic compass outdoors. To improve heading accuracy, do not stand near objects that influence magnetic fields, such as vehicles, buildings, and overhead power lines. Your watch was already calibrated at the factory, and the watch uses automatic calibration by default. If you experience irregular compass behavior, for example, after moving long distances or after extreme temperature changes, you can manually calibrate the compass. 1 Hold MENU. 2 Select Sensors & Accessories > Compass > Calibrate > Start. 3 Follow the on-screen instructions. Setting the North Reference You can set the directional reference used in calculating heading information. 1 Hold MENU. 2 Select Sensors & Accessories > Compass > North Ref.. 3 Select an option: • To set geographic north as the heading reference, select True. • To set the magnetic declination for your location automatically, select Magnetic. • To set grid north (000º) as the heading reference, select Grid. • To set the magnetic variation value manually, select User > Mag. Variation, enter the magnetic variation, and select Done. Altimeter and Barometer The watch contains an internal altimeter and barometer. The watch collects elevation and pressure data continuously, even in low-power mode. The altimeter displays your approximate elevation based on pressure changes. The barometer displays environmental pressure data based on the fixed elevation where the altimeter was most recently calibrated (Altimeter Settings, page 56). Altimeter Readings WARNING This watch is not intended to provide primary flight information and is to be used for supplemental purposes only. The altimeter functions differently depending on the selected source. You can adjust the altimeter settings by holding MENU, selecting Activities & Apps > Fly, selecting the activity settings, and selecting Altimeter. Sensors and Accessories 55