Before we get in a silly squabble, I'd just like to say that you are all correct about everything!!!!
JTIDS boxes have got smaller since the F3 started using them years ago. However they also tend to be smaller for single seat platforms because they're not necessarily all singing all dancing - as they are on an F3 - because one guy simply hasn't get time to be tapping in messages, or whatever, as he approaches the merge!
The full range available goes from the aforementioned all singing all dancing to purely position reporting / receiving modems, and anywhere in between. When an IDM becomes JTIDS is, I think, just a matter of what jargon industry want to use today.
As for tankers, they obviously don't need a full up terminal, but it isn't half helpful when you can see where they are on JTIDS - but I think the muds might argue that their need is greater. It might just stop them shooting friendly fighters for a change!
