Feet for altitude, nautical miles for distance traveled, knots for speed, statute miles for visibility, centigrade for temperature and dewpoint, pounds of weight and gallons or quarts for volume.
General rules:
Exceptions may be made at the discretion of the mods.
Feet for altitude, nautical miles for distance traveled, knots for speed, statute miles for visibility, centigrade for temperature and dewpoint, pounds of weight and gallons or quarts for volume.