Page 1 of 1

PSPP8A TEC route

PostPosted: Fri Nov 22, 2019 10:47 am
by dhplane
Hi guys,

I was looking at the TEC route for KPSP-KTOA (PSPP8A) and the routing after PDZ is the PDZ270/16 then DOWDD, which is less than half a mile short of the previous point... what is the proper way to fly that routing?.... thx as always... Joey

Re: PSPP8A TEC route

PostPosted: Fri Nov 22, 2019 12:13 pm
by kullery
PDZ270/16 is essentially the same as DOWDD.

If I recall correctly, the TEC Route was defined prior to DOWDD being established so the waypoint was defined as PDZ270/16. When DOWDD was created it was added to the TEC rout but they neglected to remove PDZ270/16.

Re: PSPP8A TEC route

PostPosted: Fri Nov 22, 2019 4:14 pm
by dhplane
Makes sense, but I just wanted to make sure to avoid making a mistake... I was especially confused because both MYFLIGHTROUTE and Foreflight still list it that way...

Thanks for the prompt response!

Re: PSPP8A TEC route

PostPosted: Sat Nov 23, 2019 5:29 pm
by Keith Smith
it makes more sense when you realize that it's not half a mile short, but is exactly the same point :) Check the low enroute chart, the mileage indicator for DOWDD is 16.

Re: PSPP8A TEC route

PostPosted: Sat Nov 23, 2019 10:46 pm
by dhplane
You’re right, Keith, my confusion came from looking at ForeFlight and Skyvector, both of which depict the two points as slightly displaced from each other...

Re: PSPP8A TEC route

PostPosted: Sun Nov 24, 2019 4:25 am
by kullery
Ironically, that displacement is the result of “too much” accuracy.

The FAA’s description for DOWDD places it at: PDZ*C*270.00/15.61. So technically, there is a difference of .39 miles between DOWDD and PDZ270/16. The difference is relatively insignificant with an airway width of 8 miles.

Re: PSPP8A TEC route

PostPosted: Sun Nov 24, 2019 4:37 am
by dhplane
I just found the FAA database that lists all the fixes/waypoints... I learn something new every day here... thx again!