Reproduced from che holdings of the Natiougl darchives Preeti 260i pe “A 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