A sailer friend has a Null Altitude Calculator
BUSHIPS-916
It has 2 scales; K=20,000, K=16,000

He asked if I knew what it is.
--
A host is a host from coast to coast...............wb8foz@panix.com
& no one will talk to a host that's close..........................
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433

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