I have a high res tiff file of the original I borrowed from Ed Schiess.
I looked at it and don't see any water! I see low lying hills which fit
with the area the NAF was located at Salem. PBYs at Salem were very
normal has were most Navy types of the era. Salem was a tennant
command of NAR Seattle and it's a/c there were assigned to VF-891/VF-893
and carried the 'T' on the verticle. I have a squadron photo of VF-891 in
front of a FG-1D. Test pilot Scott Crossfield was a pilot in the sqd. at this
time also.
PS: Sorry bout your dad!!