CAN-US forces question

While monitoring 11.232 USB today caught OTIS 83 call Trenton Military for a radio check, Trenton answered , but OTIS 83 did not reply . Then Trenton proceeded (several times) to ask what sector are you in, and do you see any landmarks. Trenton then ,asked are you in sector 5 OTIS 83 ,still no reply.Then REBEL 39 asked for a radio check , and got it from Trenton , I never heard REBEL 39 again either. Now I know the OTIS call signs are C130s, and the REBEL call sign is either an F15, F16, or F22 (must be a popular one), according to the lists I have. My questions, is this normal?? Anyone know if their might be some type of exercise? And should I even post this type of information? Thanks for any help, Mike