10km/s = 6 miles/h = 3 meter/s = 5 knots
1,000 meter = 3,300 feet
10 kilometer = 6.2 miles = 5.4 nautical miles
DeLorme AG-008727-201 InReach Explorer Two Way Satellite Communicator with Built in Navigation
Ranked most important mountaineering safety tech by HumanEdgeTech.
Professional windmeter (200gr/7ounces) measure up to hurricane force and beyond (40 meter/second or 89 mph). Temperature, relative humidity, compass and pressure.
Runs on 1 AA lithium battery. Expected battery life 400 hours.