Thanks for the info draconus, much appreciated. if this helps anyone else. The reason I could not see my second tanker was I did not activate in route task (Tanker). Once I did, it came up on my comms menu and no problems.
I see the tanker I want ARCO-210 and I see Texaco-1 but I cannot see how to change between them for Comms. I keep getting Texaco request rejoin.
I did give them different frequencies. Can anyone tell me how to switch between the two?