Fahrenheit or centigrade?

Sergeant-major explains to soldiers:
- The maximal angle of raising a tank gun is 30 degrees.
One of the soldiers asks:
- What kind of degrees, sir? Fahrenheit or centigrade?
Sergeant-major is thinking for a while and replies:
- Fahrenheit!
Soldiers laugh. Sergeant-major smiles too:
- It was a joke. Of course, centigrade.

Have fun in Ukraine!