Substitute Routes - what exactly are they?

[Andrew Sarangan]

These are shown on the LL enroute chart by little brown circles connected
by a line. The legend says "substitute route, see NOTAMs". There are
several originating from the DQO VOR near the Washington DC area, but there
could be others as well. I have never noticed these before. Any ideas what
they are?

[Dave S]

Did you check the notams?

Dave

Andrew Sarangan wrote:
> These are shown on the LL enroute chart by little brown circles connected
> by a line. The legend says "substitute route, see NOTAMs". There are
> several originating from the DQO VOR near the Washington DC area, but there
> could be others as well. I have never noticed these before. Any ideas what
> they are?
>

[Andrew Sarangan]

This is what the NOTAM says:

!FDC 4/1981 ZDC MD.. FI/T AIRWAY ZDC.
V170-214-433-445 ODESA INT, MD TO KERNO INT, MD NA. USE SUBSTITUTE
ROUTE.

This segment of the substitute route goes directly over the airway,
except it appears to have a different MEA. So, what's the point of
creating a whole new thing called a 'substitute route'? Why not just
issue a NOTAM amending the MEA?




Dave S > wrote in
ink.net:

> Did you check the notams?
>
> Dave
>
> Andrew Sarangan wrote:
>> These are shown on the LL enroute chart by little brown circles
>> connected by a line. The legend says "substitute route, see NOTAMs".
>> There are several originating from the DQO VOR near the Washington DC
>> area, but there could be others as well. I have never noticed these
>> before. Any ideas what they are?
>>
>
>

[Roy Smith]

In article >,
Andrew Sarangan > wrote:

> These are shown on the LL enroute chart by little brown circles connected
> by a line. The legend says "substitute route, see NOTAMs". There are
> several originating from the DQO VOR near the Washington DC area, but there
> could be others as well. I have never noticed these before. Any ideas what
> they are?

They're repaving the airway. This is the detour around the construction
equipment.