there
are 3 NAP charts in your manual
. for this one you
need to refer to the little one with the brown over print
this actually
started life as an AER LINGUS A330 ETOPS PLANNING CHART
. If you turn to the
back of it (big writing), find SHANNON and GANDER, put a ruler between
in the
middle it says 1715
that is your sector distance!!
Now measure mean TRUE
COURSE at the mid point
.. 260 264 is good enough
. Hence ANSWER (b)
1720nm,262°T