Whys it say negative sometimes?

 

On that one photo?

I would assume below sea level.

My finished floor elevation in my garage and driveway is 1198 so I set it at 1200.

Yeah. I know. Not that impressive.

 

because you can be under sea level

 

Yeah I posted it as a joke But its really what it read.

 

I thought only Aquaman and the Man from Atlantas could be under the sea. Or is that Spongebob?

 

The Lexus altimeter relies on barometric pressure. I live at 6800 feet in CO and if I set it during high pressure it will show me at over 7000 feet when low pressure comes through. So you need to reset to known altitude often for reasonably accurate readings.

 

Rocky Mountain Nat'l Park outside Estes Park, CO: 9K feet.

I think my altimeter is a bit conservative...