Reproduced from che holdings of the Natiougl darchives
Preeti
260i
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B52
RESIDENT ENGINEER
David L. Narver, dr.
meth
Lots
ona
.
.
Trianculation Survey
fefo
The Cocaefox-Oboe triangle has an error of closure of 5.6 seconds,
As
this error exceeds the allowable limit snd is part of the primary net,
edditional observing to reduce the error of cloguttea will be necessary.
While the error could be at Oboe it is more probable that it will be
found at Cooa as the horizon closure at this station ia large aeapproximately the same amount as the triangle closure, If reobserving Fox,
H, How and Oboe from Coca reduces the error of closure below 5 seconds
no further work should be done,
are satisfactory,
All other triangles sulmiited so far
This includes station Sait or Sugar.
The following baseline records have not been raceiveds
Fieid notes and computations Stations Smith to Roger,
Field notes Stations Piper to Pox,
a
These showld be sent in immediately as no further commiting or adjustment can be
made until they are received.
It 4s satisfactory to locate etations Ren and Air hy precise angle and distance
ties from the baseline. Concluded triangles including these stations are not
NHECessary
The memorandum of 64-53, Curran to Dietze, -mentiona that the angles in this
quadrangle ere also scheduled. If this means observing e Salt-Piper~Oboe-Coca
triangle it isiheceasary as the angles at Coca would ba too amall to give any
conclusive check between the two sections of the basq@line,
Location of the islands on the east reef from Nan to How will be required to third
order accuracy.
It appears practices! to accomplish this survey by locatiag Mike
by the triangle Mike-Nan-Oboc and then traversing fruu
method the traverse is tied to a known station at each
eliminating the necessity: for precise measurement. It
use a 300 foot tape for this measurement which cer be
standard tapes which sre ci ‘he Jobsite.
pan, es ke
oy:
at this tine,
ER(S)]
work and should result in a net which is well within second order
telarances. The records are being checked here as they are received
and the following remarks are based on the information available here
SINGLE REVIEW A UTHORIZED BY:
BA SasBle P= PIFY
REVIEWER {ADD):
NAME: W772).
DATE: 7 fa
The field records and computations received to date indicate very good
DEPARTME NT OF ENERGY DEC
LASSIFICATION REVIEW
DETERMINATION [CIRCLE NUMB
1. CLASSIF ICATION RETAINED
2. CLASSI ICATION CHANGED To:
3. CONTA NS NO DOE CLAS
SIHED INFO
OOR DINATE WITH;
EASSI ICATION CANCELLED
6. CLASSI [ED INFO BRACKETED
dune 12, 1953
Mike to 5S. Eow, By this
end and can be adjusted,
should be satisfactory to
calibrated from the 100
& copy of « two page report on the U, 3, Navy Survey ot Bikini is enclosed which
should be of interest. “his report st tes thet Stetions Air, South end Enyu are