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Travel after dark in the lagoon was considered dangerous anc the personnel were
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Observing procedure consisted of adjusting the intensity of the station lights
to the minimum which could be observed thereby obtaining a small targer considernt
of
i.Natlo
Pacific Southwest-Regio
<
distributed before dark and picked up after sunrise in the morning.
ing the distance involved.
This was done as early in the evening as sufficient
darkness ras obtained ard from one to three sets of six positions each were observed.
Due to weather it was sometimes only possible to complete one satisfactory set in an
_e¥ening.
From two to five hours were spent in observing.
When results obtained
‘were within the specifications of the U.S. Coast and Geodetic Survey no attempt was
made to obtain further refinement.
The strength of figures obtained for the net was an RI of 74.4 with a maximm
of 130 allowed,
A maximum triangle closure of 2.5 seconds and an average closure of 1.3 seconds
= was obtained with the maximum of § seconds for one triangie and 3 seconds for the
average closure allowed by specifications.
br TYER DATED JULY,
1994
FROM ANTON SINISGALLI TO
DIANE S. NIXON
The RUNIT BASE LIKE is a broken base consisting of four sections connecting
the two stations, North Base and Runit.
of the island.
This was necessary due to the configuration
Traverse Station Runit of the Joint Task Force Severn Survey is an
angle point in this traverse and was also included in the former traverse,
Standard procedure of the U.S. Coast and Geodetic Survey for second order base
line measurement was used,
Angles were measured with the Wild Te2 theodolite and
the measurement was made with three Lovar tapes using thermometers and stretcher
apparatus of an approved type.
The calibration certificates of these tapes are in«
cluded in the reeord of the survey.
Stakes were set at fifty meter intervals for chaining points and the tapes were
alternated so that in completing the forward and backward measurement all three
tapes were used in each direction.
Due to the velocity of the wind at this perioc of the year it was necessary to
use a wind bresk in order to obtain accurate results.
This consisted of a thirty
JO
mi
URGE