Originally Posted by Chicago2210
What about "aircraft stand-by's"? Do they use Main/Engelwood in addition to the trunk systems?
@ O'Hare...Batt. 6 calls Main to request "a box and a plan" for their stand-by/emergency/crash alerts. The OCC (O'Hare Communications Center) Trunking system is used too. They normally use Fireground on the field.
@Midway...Batt. 16 does the same as Batt. 6 "if in quarters". Usually Fireground is used too, but the Midway Trunking System "CFD Fire" Channel is used too.
With the new and upcoming conversion from VHF to UHF, they're will be a wider array of channels to use, so Firegound may or may not be used the same as it is now.