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triangulation stations.
Actual observing on this survey started in October, 1949.
The observing party consisted of an observer, recorder and a varying number
of light tenders.
The party was quartered on an L.c.7. which moved to conven=
jent points in the lagoon as required,
An 1L.C.M. and a DUKW were used for trans-
experienced,
The towers were adequately braced and little vibration was
All observing was at night using lights for targets.
theodolite was used for observing and found to be very satisfactory.
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Some dif= i
ficulty was experienced with the exterior lighting probably due to moisture.
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Station lights were constructed from U.S. Navy battle lamps by installing a reot: i
stat.
This made it possible to dim the lighte to correct intensity and they made
a satisfactory target,
Continuous inter-station communications were considered necessary due to the
remote location of the stations,
portable radios.
This was realized by using U.S. Army Type 419
Considerable time was saved by this means of communication as the
light intensity could be adjusted instantly and changes in plans could be tranemitted to all personnel involved.
This was often necessary due tc weather con=-
ditions.
The observing was done at 4 period of the year when considerable rain and
high wind velocity was experienced.
Some time was lost due to weather both in
being unab le to get to the stations and poor visibility while occupying the
stations.
Water transportation was ad,quate but necessarily slow and the personnel
tere ususlly awey from the base of operations fourteen to sixteen hours.
DIANE §. NIXON
structed of wood,
Where low towers could be used they were cone
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stations as the survey progressed.
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GULY,
Four Bilby steel towers were available for the survey and were moved to new
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having landing strips.
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portation to the stations, and when practical, planes were used between the islands
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Pacific Southwést Region
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A reconnaissance of all locations involved was made and markers set for the
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Natio nal Archiy es.
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Field Procedure
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