How does Boeing park several airplanes on a single runway at Paine Field? On DigitalGlobe, I saw the following picture in an article, which talks about some of the best aerial shots of 2014.


Paine Field, Washington

Questions

1) Did the plane, highlighted with a yellow circle, need to reverse to line up so neatly even though it just turned (I assume). Is the turning radius really that small that it takes very little space for a big plane to change direction so quickly on ground?

2) Is there any special reason that all the planes are on one side of the runway and not centered on the markers? They all seem to be lined up towards the left side of the picture.

3) Isn't that too close when there is another plane parked so close in proximity? Provided there is ample space available.

4) Is it just that the scale of this picture, taken from a satellite, making them look closer than they really are?

5) What does that Double marking 7/91 Mean on the North East end of the small runway? usually that is a single number indicating the heading. That can't be 91, then what does that 91 mean?

6) Why are  there a bunch of planes that are about stacked on top of each other towards the bottom right of the photo, on the ramp to 29?

P.S: I know they are parked and are not taking positions to take-off.
It was tugged to that position via tug.
Angle of photo + possibly trying to offset weight, from centerline.
These planes are just being stored there. They'll be tugged to another location
before they even bother to start them up, and I believe most don't
have engines on at present.
They are quite close together.
(from @ratchetfreak's answer:) Turn the image around as if you are coming to land; it's actually 16L a perfectly normal runway number.
Its just a very compact way of parking aircraft in minimum space. Compare the space taken up by those 4 planes versus any 4 nose-to-tail on the runway.


These aircraft are mostly 787s that are the early teen aircraft that were rejected by the original airlines they were slated for, due to so many out of tolerance issues/rework required. They are just being stored on the runway until Boeing can get them into mod/rework status and get them to spec to be able to sell. Right now the mod line seems to be working on one of these aircraft, at a time, and each one taking many, many months to get fully reworked.