Here is a thought,
Most Jet traffic is from the EAST and would more then likely have gotton the old
Jenna 4 (RNAV Star), which use to have a visual procedure or arcing for the 21 ILS if IMC.
Now we have a
Jenna 5 with tracking to
HAIGH for the
21 ILS via WOORA and SNOOK. Much better idea in my opinion
.
Track miles from
SNOOK to Touch is
34 NM
Track miles from
SNOOK to Touch
via the 9 DME arc for the 21 VOR (assuming you join before the IAF for the arc which is
roughly PRL is
35 NM
But if you managed to get a Radar Vector from SNOOK to the Straight-in IAF for the 21 VOR you would save yourself
6 NM of 'ARC', and the track NM from SNOOK to Touch is now closer to
31 NM, a saving of
3NM. No biggie for me, but for a Boeing or Airbus maybe.
I'm only taking a 'stab in the dark here. If anyone is curious enough about my maths, could you please check it out on your FMS next time you fly into PHH and let me know how I went.
Cheers
Mono