OGE hover ceiling vs. service ceiling
Can somebody of you briefly explain, why there usually is a big difference between the OGE hover ceiling and service ceiling?
I read about the Bell Jet Ranger (250-C20J) that is has a service ceiling of 13500ft whereas the hover ceiling OGE is at roughly 5000ft. Does this mean when flying at 13000ft you are not able to enter a hover but that you have to descent to or below the hover ceiling OGE first and if so, why?
Or do i miss something completely? I apologize in advance for such a silly question but i did not find an explanation yet.
Regards,
Marcus