eetrojan
Pattern Altitude
Question re Knowledge Test - Determining Distance on En Route Chart
The closeup below is from Fig. 47 of the testing supplement for the instrument knowledge test - an en route chart. It's used for a question that asks you to figure out the total ETE for a flight to KPDX. So, for each leg, I need to figure out the distance and ground speed in order to calculate the leg time.
One of the leg distances I need to determine is the BTG to PDX leg (blue). I know from peeking at the answer on Sporty's that it has a distance of 10.
How would I know that for sure? Is it 10 simply because the PDX VOR is located at KPDX and because the blue circle indicates Class C airspace that normally has a radius of 10 NM? Or, is there a more definitive way of determining that it's 10 from this chart?
Thanks!
The closeup below is from Fig. 47 of the testing supplement for the instrument knowledge test - an en route chart. It's used for a question that asks you to figure out the total ETE for a flight to KPDX. So, for each leg, I need to figure out the distance and ground speed in order to calculate the leg time.
One of the leg distances I need to determine is the BTG to PDX leg (blue). I know from peeking at the answer on Sporty's that it has a distance of 10.
How would I know that for sure? Is it 10 simply because the PDX VOR is located at KPDX and because the blue circle indicates Class C airspace that normally has a radius of 10 NM? Or, is there a more definitive way of determining that it's 10 from this chart?
Thanks!
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