skydiving altimeter, used by skydiver, with a pen for annotation, brick background, top view, zoom photo

air skydiver altimeter altitude aluminum annotation aviation avionics brick background button buttons electronics antique old vintage retro equipment feet meters flight fly meter indicator height military non-digital parachute paratrooper parachutist pen pointer pilot pqd red screen marking technology used top view sport sky plane black white needle jump safety isolated zero hand freefall command colorful excitement extreme leisure danger