heig;ht of the anemometer cups above the water- 

 line in meters. 



14-21 Wind. — The direction from which the 

 wind is blowing is recorded in degrees true. 

 When the ship is equipped >vith an anemometer, 

 record the wind speed in ivnots. 



14-22 Wind Force (Beaufort).— When the 

 ship is not equipped with an anemometer to 

 determine the wind speed, estimate the wind 

 force using Beaufort scale. Record the value 

 using the code given in table 9. 



14-23 Barometer (In MBS.).— The baro- 

 metric pressure is recorded in millibars, using 

 2 digits, thus neglecting the 900 and 1,000 

 values. For barometers recording in inches of 

 mercury, use table 11 to convert to millibars. 

 For barometers recording in millimeters, use 

 table 13. 



14-24 Air Temp. °C.— The dry and wet 

 bulb air temperatures are recorded in degrees 

 and tenths Celsius (centigrade). To convert 

 Fahrenheit to Celsius, refer to table 13. 



14-25 Humidity. — Relative humidity is re- 

 corded in percent. To compute relative hu- 

 midity refer to table 14. 



14-26 Weather.— Record the state of the 

 weather, using the 2-digit code given in table 1. 



14-27 Clouds. — Record the significant cloud 

 type by the single-digit code given in table 2. 

 Indicate the amount of sky covered, using the 

 single-digit code given in table 3. 



14-28 Sea. — The direction from which the 

 wind waves (seas) are coming is recorded in 2 

 digits, using the code given in table 8. The 

 2-digit code is 00 to 36, with 00 indicating calm 

 and 36 indicating north; 99 indicating variable 

 or unknown Record the sea height, using the 

 single-digit code given in table 5 



14-29 Swell. — The direction from which the 

 predominant swells are coming is recorded in 

 2 digits, using the code given in table 8. Record 

 the swell amount, using the single-digit code 

 given in table 6. 



14-30 Visibility. — Record the condition of 

 the visibility, using the single-digit code given 

 in table 4. 



14-31 Water. — Record the color description 

 of the water at each daylight station, using the 

 Forel scale given by the 2-digit code in table 15. 



The transparency of the water is determined 

 by Secchi disc lowerings and is recorded in 

 meters. If both white and black Secchi discs 

 are used, record the reading of the white disc 

 first and the black second. 



14-32 Observers. — The name of the oce- 

 anographic observer in charge of the station is 

 entered in the space provided. The name of the 

 person making the thermometric calculations 



and the signature, or initials, of the oceanog- 

 rapher checking the work shall be entered in the 

 spaces provided. 



14-33 THE LOG SHEET COLUMNS.— 

 Entries are made in the log sheet columns as 

 follows. 



14-34 Cast. — Number each cast of the sta- 

 tion with a roman numeral, and enclose the 

 corresponding serial numbers of that cast with 

 brackets as shown in figure 14-2. 



14-35 Serial No. — Each observation re- 

 ceives a serial number, commencing with 1, at 

 the beginning of an oceanographic cruise. If 

 numbers are omitted, make a note to that effect, 

 otherwise the checker may think a data sheet or 

 a series of observations is missing. These serial 

 numbers are transferred to the serial number 

 columns of the C-, D-, and E-sheets used for 

 the station. 



14-36 Sample Bottle Number. — Four col- 

 ums are provided in which to record the num- 

 bers of the bottles used to hold the sea water 

 samples drawn from the Nansen bottles. The 

 first column is used for the chlorinity (Cl) 

 sample bottle numbers. The second column is 

 used for the o.xygen (O2) sample bottle numbers. 

 Two blank columns are used for other samples 

 as needed. Record the chlorinity (Cl) sample 

 bottle numbers on both the A- and D-sheets, 

 along with their corresponding serial numbers. 

 In like manner, record the oxygen (O2) sample 

 bottle numbers on the C-sheet. 



14-37 Meter Wheel. — Record in this col- 

 umn the reading of the meter wheel at which 

 each Nansen bottle is placed on the wire. The 

 number immediately above each cast in this 

 column, as shown in figure 14-2, is the meter- 

 wheel reading when the cast is down. These 

 extra few meters allow for the distance between 

 the point at which the Nansen bottles are 

 attached to the wire and the waterline. 



14-38 Wire Depth (L).— This column con- 

 tains the depths in meters, measured along the 

 wire from the sea surface, at which the Nansen 

 bottles are spaced. It is the value L used in 

 computing accepted depths. 



14-39 Nansen Bottle No.— Enter here the 

 number of the Nansen bottle, thermometer 

 frame, or a designation of any other instrument 

 used. 



14 40 Left Thermometer and Right Ther- 

 mometer Columns. — These 2 sets of 7 columns 

 each are used to record the data of the pro- 

 tected and unprotected deep-sea reversing ther- 

 mometers, which are mounted on the Nansen 

 bottles, and the instructions for calculating the 

 correct temperature readings are given in 



H. O. 607 



141 



