Obtuse ATC Callsigns in General Discussion Posted March 17, 2018 This topic has come up before on the VATUSA forums before as well, not much agreement there in the discussions I've seen. The main issue I see is that how much more helpful is it if you see *_EH_CTR vs *_7_CTR? Sure, if your'e coming from the east, you'll probably want to call *_EH_CTR, but what about if you're coming from the south? Where's the E/W cutoff line? Also, high-low splits vary depending on the area and sector. A high sector may have a floor of FL210 in one part and FL240 in another part, and so on. Same goes for approach. Sometimes you'll see more descriptive subsector names (like NY_CAM_APP for arrivals over CAMRN or NY_RBR_APP for arrivals over ROBER), but there's no corresponding LENDY subsector. In fact, the LENDY arrivals into JFK switch between CAM and RBR depending on the runway configuration. I think other places also run into the character limit for callsigns so they're even less able to apply descriptive subsector names than NY. The last point is something someone else already brought up, shift changes. Sectors get split and recombined during events. Suppose EH, EL, WH, and WL were all online and then WH closes and is combined with EH (but you as a pilot don't know this). If you're coming from the west and at cruise, who do you call? As far as I've seen, many subsector names are aligned with real world sector numbers or names. It makes it easy on the ATC side to see immediately who has what sector if you're familiar with the sectors. Instead of having to go to a table and remember does the actual 05 or 11 sector belong to E or N or whatever. I've also seen where the splits are ad-hoc and E in one event isn't necessarily E in another event. The overall point here being that I personally don't see that much of a benefit even if you switch to more geographically obvious callsigns because it's still a guessing game unless you already know the sectors anyway. On top of that, there's the callsign character limit so you can only add 2 letters anyway for a ***_[sector]_CTR or ***_[sector]_APP anyway.