2. PLANS AND PREPARATIONS 



23 



All tide stations shall be established in 

 accordance with the instructions contained 

 in Special Publication No. 196, Manual of 

 Tide Observations, except as amended by 

 project instructions. 



2-10 Instructions for current stations. — 



When current observations are to be made, 

 the project instructions will specify: (a) 

 where they are to be made, (b) the period 

 of continuous observations required at each 

 station, and (c) the instruments to be used 

 in obtaining the data. 



Current observations shall be made in ac- 

 cordance with instructions contained in Spe- 

 cial Publication No. 215, Manual of Current 

 Observations (1950 edition) except as 

 amended by the project instructions (see 

 1-47). 



2-11 Magnetic observations. — The proj- 

 ect instructions may specify locations where 

 magnetic stations are required. In the ab- 

 sence of specific instructions, magnetic ob- 

 servations should be made with a transit 

 magnetometer at intervals of 5 to 10 miles 

 along the coast. The instrument used should 

 be standardized before and after the field 

 season by making four complete sets of decli- 

 nation at a standard station. Magnetic 

 anomalies of 2° or more should be investi- 

 gated to determine their limits. Observations 

 shall be made in accordance with instruc- 

 tions contained in Serial No. 166, Instruc- 

 tions for Magnetic Measurements. 



2-12 Oceanographic observations. — 



When oceanographic observations are to be 

 made in addition to temperature and salinity 

 determinations required for correction of 

 echo soundings, the project instructions will 

 specify: (a) station locations, (b) frequency 

 of repeat observations, (c) types of observa- 

 tions to be made, and (d) instruments to 

 be used. Observations shall be made in ac- 

 cordance with instructions contained in 

 Hydrographic Office Publication No. 607, 

 Instruction Manual for Oceanographic Ob- 

 servations, except as modified by the project 

 instructions (see 1-48). 



2-13 Miscellaneous instructions. — The 



miscellaneous instructions will specify the 

 scale of the chart to be used in drafting the 

 progress sketch to be submitted each month, 

 and will usually call attention to general re- 

 quirements for coast pilot notes, chart in- 

 spections reports, and procedures to be fol- 

 lowed if new dangers to navigation are 

 discovered. 



The Chief of Party shall acknowledge re- 

 ceipt of project instructions, and amend- 

 ments thereto, in writing. 



2-14 Project study. — On receipt of proj- 

 ect instructions and the accompanying data, 

 the Chief of Party should make a careful 

 study of them to assure himself that all nec- 

 essary data have been received. If omissions 

 are discovered, or the data forwarded are 

 considered insuflSicient, he should request 

 from the Washington Office any additional 

 data required. He should also report to the 

 Washington Office immediately any revisions 

 of the requirements which he recommends, 

 any parts of the instructions which are not 

 clearly understood, or any subjects relative 

 to the project about which he desires more 

 complete or additional information. 



2-15 Plan of operation. — The project in- 

 structions may call for priority in certain 

 phases of the operations and these must be 

 planned for completion in the order of prec- 

 edence established. In the absence of priori- 

 ties, the work should be planned to provide 

 uniform and parallel progress of the various 

 operations. In order to plan and carry out 

 effectively and systematically extensive com- 

 bined operations, it will generally be neces- 

 sary to plot on a chart of suitable scale the 

 limits of the project, the limits of previously 

 surveyed areas with which junctions must be 

 made, all previously established triangula- 

 tion stations in the area, and any other data 

 which may be used in developing the plan. 

 A division of operations between the various 

 units of the party should be made so as to 

 secure maximum progress consistent with 

 economy and safety in the use of the survey 

 ship and launches. 



Obviously any general plan of operations 

 is subject to change as field work progresses. 



