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SID Portland One Lost Comms Procedure

Asked by: 2540 views Instrument Rating

Can someone please explain this departure procedure at PDX ?  I've gotten different people to interpret it and they all have different interpretation.
 
LOST COMMUNICATIONS: If no contact with ATC within 10 NM of airport,
continue climb to assigned altitude and proceed direct BTG VORTAC. Continue
climb on BTG R-329 within 10 NM to cross BTG VORTAC BTG R-355 CW R-055
or R-085 CW R-115 at or above 5000 feet. Continue climb on course.

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3 Answers

  1. Best Answer


    John D Collins on Nov 10, 2016

    Parsing the lost communications instructions:

    “If no contact with ATC within 10 NM of airport,continue climb to assigned altitude and proceed direct BTG VORTAC.”

    The first sentence is straight forward and should not need to be explained. Direct to BTG.

    “Continue climb on BTG R-329 within 10 NM to cross BTG VORTAC”

    I take this to mean after crossing BTG VORTAC, you would turn and intercept the 329 radial and track it outbound, then do a course reversal (say a 90-270) so that you remain within 10 NM of the BTG VORTAC and track the 329 radial back inbound to BTG.

    “BTG R-355 CW R-055 or R-085 CW R-115 at or above 5000 feet. Continue climb on course.”

    I take this to mean to depart BTG VORTAC between one of two acceptable wedges, any radial between BTG 355 radial clockwise to BTG 055 radial is one acceptable climb wedge and the other acceptable climb wedge is BTG 085 radial clockwise to BTG 115 radial. Continue the climb in the chosen wedge until reaching 5000, then the remainder of the climb should be on course to your first point in your route.

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  2. CFI on Nov 11, 2016

    Thanks so far John, your explanation helped clear this up a little more.

    So i think that means i have 3 options for climbing.
    329 radial with procedure turn, or either of those other climb wedges. Now would i pick any of the radials that define the climb wedge and just climb on the radial with procedure turn or could i do a hold using one of those radials as the inbound course?

    Last question, once i get to the desired altitude required for the airway i filed, then i could cross the btg vor and proceed on course. I see there is an airway from btg that goes southeast that has an MEA 7000. So i think that means if i was to fly that airway, i would climb in the wedge until 7000, then i could proceed on V520.

    I looked at the terrain around BTG vor and

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  3. atcfinest on Nov 21, 2016

    I agree with Mr. Collins. From the ATC side, it looks like the 2 wedges are departure gates you should highly consider taking, especially if you are nordo and ifr. In terms of climbing to 7,000′, so long as you cross the 10 DME at 5,000′ you are in compliance. If your truly nordo, remember that you are expected to climb to 7,000′ 10 minutes after departure. I’m not geographically familiar with PDX, but if you are going to be too low within the first 10 mins, then yes – continue climbing to comply with the MEA.

    Please remember to squawk 7600 when that happens.

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