CHAPTER 14 



INSTRUCTIONS FOR RECORDING OCEANOGRAPHIC OBSERVATIONS, 

 MEASUREMENTS, AND SAMPLES ON LOG SHEETS 



14-1 GENERAL REMARKS.— Oceano- 



graphic observations, measurements, and samples 

 obtained are recorded on special log sheets. 

 The log sheets used by the U. S. Navy Hydro- 

 graphic Office are included in this chapter, 

 together with detailed descriptions of how the 

 entries are to be made on each sheet. Certain 

 data must be plotted on the graphs. The L-Z 

 graph is discussed in chapter III, and the 

 Oceanographic Station Plotting Sheet and the 

 Temperature-Salinity Plot are discussed in 

 chapter IV. These log sheets and graph sheets 

 are listed below. 



(a) Oceanographic log sheet A: Station and 

 Thermometer Data, PRNC-NHO-1188. 



(6) Oceanographic log sheet B: Bathyther- 

 mograph Observations, PRNC-NHO-li89. 



(c) Oceanographic log sheet C: Dissolved 

 Oxygen Determination, PRNC-NHO-1190. 



((/) Oceanographic log sheet D: Chlorinity 

 and Salinity Determination, PRNC-NHO- 

 1191. 



(e) Oceanographic log sheet E : Station Sum- 

 mary, PRNC-NHO-1244. 



(J) Oceanographic log sheet GEK 1 : Elec- 

 tromagnetic Current Observations, PRNC- 

 NHO-1336. 



(g) Oceanographic log sheet GEK 2 : Electro- 

 magnetic Current Computations, PRNC- 

 NHO-1336a. 



(A) Oceanographic log sheet L: Inshore 

 Survey Station Sheet, PRNC-NHO-1364. 



(?') Oceanographic log sheet M Bottom 

 Sediment Data, PRNC-NHO-1365. 



(j) Shipboard Wave Observation Log, 

 PRNC-NHO-1192. 



(k) Ship and Aircraft Ice Log, H. O. Misc. 

 No. 15,584. 



(0 Oceanographic Station Plotting Sheet, 

 H.O. Misc. No. 15,252-1. 



(m) Temperature-Salinity Plot, H. O. Misc- 

 No. 15,252-2. 



in) L-Z Graph, H. O. Misc. No. 15,252-3. 



14-2 Obtaining Log Sheets. — The above 

 listed log sheets and graphs may be obtained 

 from the U. S. Navy Hydrographic Office, 

 Washington 25, D. C, upon request. When 

 requesting log sheets and graphs, include the 

 complete title and number. 



14-3 Station Folders. — Each oceanographic 

 station usually requires the use of several log 

 sheets and graphs. A convenient method of 

 filing these sheets is to use a 9^- x 12-inch 

 manila folder, using 1 folder for each station. 

 In the left-hand corner of the folder, tab record 

 the ship's name or code, cruise name or number, 

 and the oceanographic station number. A 

 station folder shown in figure 14-1, will usually 

 include the following log sheets and graphs: 



(a) Oceanographic log sheet A. 



(b) Oceanographic log sheet C. 



(c) Oceanographic log sheet D. 



(d) Oceanographic log sheet E. 



(e) An L - Z, or cosine (Z/L), graph for deter- 

 mining Accepted Depths. Millimeter graph 

 paper is recommended. 



(/) Oceanographic station plotting sheet, 

 or an equivalent 10 x 10 to the K-inch graph 

 paper. 



Ig) Temperature — salinity plot, or an equiv- 

 alent 10 X 10 to the }^-inch graph paper. 



14-4 Pencils. — In order to insure a per- 

 manent record on the log sheets and graphs, 

 a hard pencil, no softer than No. 3, should be 

 used for recording all data, calculations, and 

 graphs. 



14-5 Codes and Tables. — All oceanographic 

 codes and tables referred to in the following 

 log sheet instructions are given in part II, 

 unless otherwise indicated. 



138 



H. O. 607 



