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HORIZONTAL CONTROL - ENIWETOK ATOLL M.I.
1957 EXPANSION
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A network of horizontal control stations was established in
1949-5C to cover the eastern portion of the Atoll.
It consisted
of a primary net of second order triangulation stations, supplemental with third order stations at locations of lesser importance.
Standard procedures of the U.S. Coast and Geodetic Survey were
carefully followed in executing the survey.
Expansion surveys
were completed in 1951, 1952, 1955 and in 1957 to establish additional stations and replace stations destroyed by test operations.
The network now encompasses the Atoll and includes sixteen stations
to second order specifications and eleven to third order accuracy.
scheme.
a
A third order survey had been completed in 1944 by the
USS Bowditch to control hydrographic mapping of the Atoll. This
was followed in 1947-48 by a second order scheme of limited area
Pacific Southwest Region
Reproduced fromtheholdings of th e National Archives:*
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Some features of two previous surveys were utilized in the
by the U.S. Coast and Geodetic Survey.
As the distribution of the
existing stations of these surveys did not meet project requirements, and one end station of the base line had been destroyed, a
substantially new and stronger scheme was necessary which could be
expanded as required.
A base line for the net extended from station RUNIT on site
YVONNE to a new station NORTH BASE #2 at the north end of the
island.
Station RUNIT was common to both the USS Bowditch and
the USC & GS surveys.
NATIONAL
ARCHIVES
The base line was established to standard
REPOSITORY 24ciFic sevTHNEIT KEGION
COLLECTION £6326 ATOMIC ENERGY Commission
BOX No. £24674 (#1084) A429
EMWETOK 199-7
FOLDER HkiZQwTAg Con TROL
326 -6SAG/ 70
Ham) & NARVER
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