Commentary

March 2013 Issue

Letters: March 2013

Nice article by Larry Anglisano on ADS-B in the January issue (Which Traffic Now?). I agree with Larry that the portable solution for ADS-B in should be given good marks over the installed solutions. One point that I feel is important is that I don’t think the geographic limits of the weather information available is understood by users. A friend was returning from Florida to the D.C. area and when he could not get TAFs and METARs more than 250 NM from his position, he thought there was an equipment problem, not realizing that low-tier stations have a 250 NM look-ahead range. I guess I am spoiled by XM Radio, but I like to look at the METARs and TAFs in my destination area when the weather may be marginal and I’m still well over 250 miles away so that if things start to go south, I can land early or take other appropriate action. As a general rule, 250 NM is not a satisfactory look ahead.

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