TpZ 1A1 Eloka armored personnel carrier carries the Hummel jammer and the HELAS direction finding gear. In modern warfare the ability to locate enemy positions by triangulating their radio transmissions is critical. Electronic warfare vehicles such as this provide the commander with information to locate and target enemy radio signals so he can bring artillery fire on them. The jammer gives the commander the ability to interfere with enemy radio signals to deny the enemy the ability to call for artillery or air support, report the results of reconnaissance and to control his troops. This vehicle has been in use by the Federal German Army since the early 1980's.