TCAS
Chris,
Just to add to facilitators comments TCAS isn't perfect and is certainly no substitute for lookout but its relatively cheap and it all helps as they say. Also with the E bit you can pre- load M3s as tgts(won't say much more here) but quite useful for SA on other players that might be around or finding tankers, also useful for ranging strobes etc when operating EO.
If you want to know more, suggest you come and have a play, .....not that there's much we blunt truckies could teach you pointy sky gods, unless it's about rates, hotels, food, etc
Don't dig in, check in !