As was announced last September, this upcoming cycle will have see
the FAA discontinuation of the Whitehorse sectional. Whitehorse
sectional predominantly covers Canadian airspace.
Apps4Av is adding Seward Glacier inset (the US airspace within the
expiring Whitehorse sectional) to our next cycle, shipping in the
Juneau sectional zip file. This is manually trimmed from the
Juneau sectional margin, with ground control points so that it
overlays on top of the existing chart. The inset will be updated
by the FAA on the 56 day cycle.
For the time being, the expired Whitehorse tiles will be
retained for situational awareness only. This could
change in any future cycle.