NAV CANADA, the country's provider of civil air navigation services, conducted an aeronautical study that reviewed the requirement for controlled airspace and mandatory frequency (MF) requirements in an area below the elevation of the Northwest Regional Airport Terrace-Kitimat (CYXT) that encompasses a heliport near the town of Terrace, BC.
The study concluded that airspace 700 feet above sea level (ASL) and below in the Skeena River Valley should be removed from the control zone. This will allow helicopter operations to occur without entering the control zone, while keeping the affected airspace within the MF area.
The dimensions of the Class E Terrace control zone will appear in the Designated Airspace Handbook (TP 1820E), as shown in the following table and figure.
Terrace, BC:
The airspace within the area bounded by a circle of 5 miles radius centred on the following:
N54°27'59.00" W128°34'39.00" (Terrace, BC - AD)
Excluding the class G airspace 700´ and below bounded by a line beginning at:
N54°29'54.94" W128°37'32.18" to
N54°28'58.87" W128°43'02.85" thence clockwise along the arc of a circle of
5 miles radius centred on
N54°27'59.00" W128°34'39.00" (Terrace, BC - AD) \ to
N54°32'30.75" W128°38'15.26" to
N54°29'54.94" W128°37'32.18" point of beginning
NOT FOR NAVIGATION
These changes are planned to take effect 08 September 2022 at 0901 UTC. The appropriate aeronautical publications will be amended.