[Flightgear-devel] Carrier Altitude

[Peter Brown]

In attempting to place an item on the ocean surface, I came to realize that 
it's not the Nimitz that is "hovering" above MSL, it's that the "ocean surface" 
is about 7 meters below MSL.  I was going to suggest simply dropping the 
carriers to match, but then looking around I discovered that it was not 
constant, as the ocean surface is different from front to back of the Nimitz.

So the ocean surface is not flat.  Where it meets the terrain north of the 
Golden Gate Bridge the water is at zero MSL.  It then slopes down as it you 
head out to sea, to -8.72 meters below sea level, before starting to come back 
up again.  I did not continue out to see if it continues to rise and fall, or 
if it's purely a dip in this area.  This is different from the ocean surface 
being curved to match the earth, as it actually has a dip, at least in this 
spot.

See screenshots -

Terrain intersection north of Golden Gate
[URL=http://s512.photobucket.com/albums/t325/barefootr/?action=view&current=Screenshot2011-01-24at102804PM.png][IMG]http://i512.photobucket.com/albums/t325/barefootr/th_Screenshot2011-01-24at102804PM.png[/IMG][/URL]

At the Nimtiz
[URL=http://s512.photobucket.com/albums/t325/barefootr/?action=view&current=Screenshot2011-01-24at100253PM.png][IMG]http://i512.photobucket.com/albums/t325/barefootr/th_Screenshot2011-01-24at100253PM.png[/IMG][/URL]

West of Nimitz
[URL=http://s512.photobucket.com/albums/t325/barefootr/?action=view&current=Screenshot2011-01-24at103120PM.png][IMG]http://i512.photobucket.com/albums/t325/barefootr/th_Screenshot2011-01-24at103120PM.png[/IMG][/URL]

Anyone know why?  Or, more importantly, can we set the carriers at an altitude 
appropriate for their default location, so they are no longer "hovering"?  I'd 
prefer to do it globally so everyone was at the same altitude.  

Thanks,
Peter
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