[Milsurplus] ID'ing late model unit

[Barry]

group:
anyone help ID'ing this late model item?  probably some part of a posi-
tioning system?  manufactured by Trimble Navigation, looks like it's
out of an armored vehicle perhaps?
the face (readout side) measures about 2" x 6�"; body measures about
6�" x 7�"; three connectors on the side, two 6 pin (gold pins) w/ one
small antenna connector.  3 switches on front panel: large one (FIX,
POS, R+A, NAV, WPT, OPS, STS), two small toggle-type switches (INC: L, R
& DEC); lanyard loops w/ cloth line, very liteweight (3 lbs?).
ID tag on right reads: TRIMBLE NAVIGATION
                       F04701-89-C-0087
                       CAGE:  65457
ID tag on left reads:  TRIMBLE NAVIGATION
                       P/N: 16768-20
                       S/N: 3116A05141

pix @:
http://home.att.net/~btuttleman1/mil1.jpg
change the mil1 to mil2, mil3, mil4 to see all four pictures.
tnx in advance
barry
carson city, nv
PS: i have been on the other side of the country taking care of a family
illness, returned home to a mess w/ my mail system; anyone who attempted
to contact me the last two weeks please try again.  tnx
http://home.att.net/~btuttleman2/electron.html