azimuth of the line from station North Base on Runit Island to station Sand on sand spit south of Runit, as established by the Naval survey. At a later date, if requirements warrant, re- observe for position and azimuth, and make necessary adjustments. (b) For preliminary computations and design, accept length of base line established by the Joint Task Force Seven survey. Re- measure this line, if field work indicates it desirable, as insurance against an error in existing measurement. (c) Establish a new network to meet the requirements of this project, incorporating into the scheme any existing stations or towers which would reduce the cost without sacrificing accuracy. (d) The proposed scheme to be of second order accuracy from Parry Island on the south to Bogallua on the north. The tie to Eni- wetok Island may be less than second order, but this is justified by our present understanding that Eniwetok will not function in scientific experiments. The enclosed illustration Plate 5 shows the relation of the proposed net the the project areas. (e) This scheme could be expanded to cover the complete Atoll if justified by future requirements. (f) Second order accuracy expressed as a linear ratio allows a discrepancy between computed length and measured length of base or adjusted length of check line not to exceed 1 in 10,000. Expressed as an-anuglar error, the discrepancy in the average triangle closure shall not exceed three seconds, and the maximum discrepancy in any single triangle shall not exceed eight seconds. Method of Survey. The proposed survey procedure will include the following IV - 3