Quick Airnav freq question.

[AlmostHandy]

Hello again RR community.

I wanted to program some frequencies from local airports into my Pro97, so I went over to the recommended Airnav site. What a cool site.

Anyway, I was wondering if someone could clarify what the parenthetic numbers are between each frequency listing. Sometimes it's just numbers, and sometimes, there is a letter code.

Here's an excerpt with examples in bold;

BOEING TOWER: 118.3(309-127) 120.6(128-308) 257.8
SEATTLE APPROACH: 119.2(076-160 RY 13)

 

[immelmen]

They are radial bearings from the field that breakdown the area covered by that frequency. ie. north east of the field tower freq. is 118.3, south west of the field tower is 120.6. Notice the frequency coverage areas are split by the runway headings.

The "RY 13" is identifying that as an approach freq when using runways 13 L/R within those bearings.

 

[AlmostHandy]

Awesome! Thank you!!