Originally Posted by bollar
Actually, this NOTAM doesn't apply to operations at DCA. Part 4 only applies to the airports mentioned in part 2:
Correct
Originally Posted by bollar
Since DCA is closed to general aviation, I presume there's a NOTAM with more specific information that's not published and available to us.
Sort of...GA traffic inbound to DCA must request and be granted a waiver. Once the waiver is granted, you get instructions on arrival and departure procedures with respect to DCA.
Originally Posted by bollar
Your original NOTAM is the correct one. Presumably the discreet transponder code is assigned when the flight plan is filed and is not broadcast over the air. Each aircraft will be given its own code in advance, so when the aircraft approaches the Washington ADIZ, ATC will tell the aircraft to squak the code in the flight plan. If they dial in the wrong code, they get sent to IAD. Presumably.
The original NOTAM is for VFR traffic within the Washington D.C. ADIZ only, and does not contain the information required for flight into DCA. DCA is in the FRZ, Flight Restricted Zone, aircraft entering this area will be escorted out and forced down without proper authorization, a discrete transponder code, as referenced in the original NOTAM, is valid only for flight in the ADIZ. The transponder code is transmitted to the cockpit via clearance delivery at the departing airport, it is part of your clearance, and is active the whole time you are in the air. If you are squaking the wrong code, you know it immediately after departure...
Controller: "Citation 6-Romeo-Alpha, verify transponder, squak 5243"
Me: "5243 our fault 6-Romeo-Alpha"
Controller: "Citation 6-Romeo-Alpha Contact Departure 126.1"
Me: "Departure 26.1 see-ya."