There are 2 global hawk versions:Tier II Plus and Tier III Minus. The Tier II Plus is developed for high altitude surveillance and reconnaissance mission. The Tier III the same but on low altitude. The US Air Force used this aircraft which was flown from the United Arabian Emirates to Iraq and Afghanistan.

Germany and the Euro Hawk
In october 2003 Germany decided to buy some of these airplanes. Called: ''Euro Hawk'' Global hawk which will be for Germany and other NATO countries. On 14 and 15 october 2003 one USAF Global Hawk was already flown from Edwards Air Force Base to Nordholz AFB in Germany. There the US Air Force, Northrop Grumman and the German Air Force did some test flights. Here for the Global hawk was equipped with German elint reconnaissance equipment. ELINT means Electronic Intelligence Sensor and is made by EADS. It can detect targets over more than 500km.

RQ-4 from the US Air Force