There was no "Temporary Tower" being used to control aircraft on the day of the accident. I believe they must have been setting up and only transmitted because of the accident.
There are TWO NOTAMS regarding Class D airspace at CYRB. The first one only established a Control Zone. The second NOTAM established a Military Terminal Control Area with Tower, Ground, Terminal Control, etc.
You can have a Class D Control Zone without a tower. I believe the Temporary Tower only became fully operational during the period of the second NOTAM which began Aug 22.
While the Temporary Tower Facilities may have been in place at the time of the accident, I bet they were only giving advisories. This would possibly explain how the Borek flight was able to do an approach while First Air was still un-accounted for.
Resolute Bay is in Northern Domestic Airspace and the closest controlled airspace is normally overhead at FL270. The first NOTAM created a Class D Control Zone but since there isn't an operating control tower, it automatically reverts to Class E airspace. The only operational impact this has is to increase the VFR Weather Minima within the zone. The MTCA, control tower and radar were not due to be operational until 3 days after this accident occurred. So on that day, the flight would have been cleared out of controlled airspace as it descended below FL270 and would have just needed to report intentions and postion as required for operating in the Mandatory Frequency (MF) area. No positive or radar control would have been available on the approach.
Canadian AIM - Airspace
http://www.tc.gc.ca/eng/civilaviation/p ... 0-2599.htm
110102 CYRB RESULUTE BAY
CYRB DAH IS AMENDED AS FLW:
CLASS D RESOLUTE CTL ZONE IS ESTABLISHED AS FLW:
THE AIRSPACE WITHIN 10 NM RADIUS 744301N 945810W
SFC TO 6000 FT MSL. FOR OPS NANOOK
1108101300 TIL 1108280100
110124 CYRB RESOLUTE BAY
CYRB DAH IS AMENDED AS FLW:
CLASS D RESOLUTE MTCA IS ESTABLISHED AS FLW:
THE AIRSPACE WITHIN 80 NM RADIUS 744301N 945810W
700 FT AGL TO FL200. FOR OPS NANOOK.
FREQ FOR OPS NANOOK:
RESOLUTE TML: 228.5000 MHZ
: 123.075 MHZ
GLOWWORM(MIL PAR): 243.4000 MHZ
: 128.850 MHZ
RESOLUTE TWR: 236.5 MHZ
: 122.1 MHZ
RESOLUTE GND: 122.6 MHZ
: 149.15 MHZ
1108221200 TIL 1108280100