Yes. You take your window of vulnerability (the number of hours within which you can have an assigned report time) and reduce it by 2.

If you have a 1000-1900 short call a d declare non-contactable 1000-1200, your earliest report time is now 1200. Without having declared NC, they can (and often do) give you a report of perhaps 1130. Sure, you can be late and that’s fine when it takes you about two hours to get there, but the point is you can still be awarded that trip and off you go to work.

But you don’t get that 1130 report, and at 1000 you check your schedule. Now that trip is much more likely to have already been awarded elsewhere (hopefully premium).

You can also check your schedule at 1050 if you only need 1+10 to get to the airport, in which case it’s even more likely that trip is long gone… or check it at 1135 if you need 25 minutes.

In that last example, if you check your schedule at 1135 they COULD have given you a 1200 report. But if they didn’t and there’s nothing on your schedule, you are back to a 2 hour-ish leash. At 1140 (five minutes after you checked your schedule and found nothing) they could assign you a 1215 report (with a phone call by a human)…and you would be expected to be there roughly around 1340.

Personally, I just check my schedule at SC start and always retain the full response time to the airport.