NA UMA
ALLA LE.
REPOSITORY ZAC/EIC SourHMésT KECION
COLLECTION AG 326 ATOMIC ENERGY Commission
HORIZONTAL CONTROL
BOX No. £79674 #081) Aud24 _326-6546/70
FOLDER
VAS1- 1952 beRZone TAL CONTE SURVEY
(95S EXPANSION ENIMETOK ATOLL
MARCH Is#
STIS NOw
Reproduced from the -holdings of the National Archives
Pacific Southwest Region
The horizontal control scheme has been expanded until it now includes
the entire Atoll.
It consists of a primary network of second order
triangulation supplemented with third order stations at locations
of lesser importance.
The few remaining islands which have not been
included in the scheme can be located by single triangles from exist
ing controls.
PREVIOUS SURVEYS
BEST COPY AVAILABLE
Some features of previous surveys were utilized in establishing the
scheme.
The earliest survey from which records are available was
completed in 19) by the 0.5.8. BOWDITCH to control the hydrographic
mapping of the Atoll.
As this survey was of third order accuracy
and most of the stations were not on project islands it was not
adaptable to requirements of this project.
However,
the geographic
position of station North Base on Runit Island and the azimuth of
the line North Base-Sand became the origin of position and agimuth
for the later surveys.
A survey was completed in 197-8 by the JOINT TASK FORCE SEVEN
consisting of a limited scheme covering the eastern portion of the
Atoll.
The scheme was stated to be of first order accuracy but it
was only because of its limited extent that it could be considered
of such nigh order.
As the south end of the original base line had
been destroyed a new base line, North Base-Runit, was established
and the
azimuth of the line was
line North Base-Sand.
computed from its relation to
the
Expansion of this scheme involved re-occu-
pation of all of its existing atations and it became obvious
-l-
that