Ok, I was going to add the following in my previous message and
forgot.
Pick your favorite non-huge aircraft and run:
fgfs --aircraft=yf23-yasim --lat=37.7745 --lon=-122.4005 --heading=40
This should put you pretty much pointing at the entrance to the bay
bridge so you can try it out.
I managed to land on the top deck, still over the land on the approach to the bridge.
Then, with no rudder pedals and typically poor coordination floated gently off the
edge and landed beside the bridge on the terrain.
FGFS then died with:
Tile not found (Ok if initializing)
Attempting to