Thanks for the replies!
CpnCrunch wrote:You have to file a flight plan, have a transponder code, and be communicating with ATC:
http://copanational.org/files/AOPACOPAC ... Manual.pdf
("Overflights" section).
I'm not sure if a flight plan is technically required, at least in BC where Victoria/Vancouver ATC control the US airspace. I think as long as you have a transponder code they will probably be happy.
Hmmm, so I suppose calling a U.S. FSS for a squawk code should satisfy the ATS contact requirement.
I also found that there is an FAA NOTAM regarding this:
https://pilotweb.nas.faa.gov/PilotWeb/n ... tType=ICAO
AIRCRAFT REGISTERED IN MEXICO, CANADA, BAHAMAS, BERMUDA, CAYMAN
ISLANDS, AND BRITISH VIRGIN ISLANDS ARE AUTHORIZED TO TRANSIT THE
TERRITORIAL AIRSPACE OF THE U.S., IF IN COMPLIANCE WITH CONDITIONS 1
THROUGH 3
1. FILE AND ARE ON AN ACTIVE DIRECT FLIGHT PLAN (DVFR INCLUDED) THAT
ENTERS U.S. TERRITORIAL AIRSPACE DIRECTLY FROM ANY OF THE COUNTRIES
LISTED IN THIS PARAGRAPH. FLIGHTS THAT INCLUDE ANY STOP IN A
NON-LISTED COUNTRY MUST COMPLY WITH ALL REQUIREMENTS FOR OTHER
FOREIGN REGISTERED AIRCRAFT IN ACCORDANCE WITH PARAGRAPH L OF THIS
NOTICE;
2. ARE EQUIPPED WITH AN OPERATIONAL MODE C OR S TRANSPONDER
AND CONTINUOUSLY SQUAWK AN ATC ISSUED TRANSPONDER CODE;
3. MAINTAIN TWO-WAY COMMUNICATIONS WITH ATC.