[Trlog] "All Sun" in beam heading window

[Jim Smith]

In a recent contest (NOT arrl 10m) I keyed in RZ0ZWA.  The beam heading 
window showed the heading to be 195 instead of the expected 309 and, 
instead of the usual distance, sunrise/sunset info the words "all sun" 
appeared.  This was around evening grey line time.  IIRC the 195 heading 
was in sunlight but 309 - 180 = 129, not 195.

Any idea what's happening here?

73, Jim   VE7FO