PROCESSING PROCEDURES 



21 



Explanation of Entries in Heading 



cruise: Designation of the particular cruise. 



station: Number by which station is identified. 

 Stations occupied on a cruise are numbered con- 

 secutively or by numbers assigned by position. 



latitude: Given in degrees and minutes. 



longitude: Given in degrees and minutes. 



vessel: Name of the vessel. 



date: Day, month, year. 



time zone: Number of hours to be added to local civil 

 time used in the observations to give Greenwich civil 

 time. 



bt number: Serial number of the bathythermograph 

 instrument. 



slide number: Niimber of the bathythermograph slide 

 or observation. 



SONIC depth: Depth of water in fathoms. 



wind direction: Direction from which the wind is 

 blowing, given in degrees counted clockwise from 

 north. 



WIND force: Given according to the Beaufort scale. 



sea: Given according to the Douglas sea and swell 

 scale. 



weather: Given according to the United States 

 Weather Bureau "Instructions for Recording and 

 Coding Marine Meteorological Observations in the 

 New International Code," 1948. 



clouds: Types of clouds, and amount of sky covered. 



wet bulb: Wet-bulb temperature given in degrees 

 Fahrenheit. 



DRY bulb: Air temperature given in degrees Fahren- 

 heit. 



Upper right section of heading: In this sec- 

 tion are entered for each water bottle cast the 

 following information, where time is given in 

 local civil time: 



WIRE angle: Angle from the vertical at which the wire 

 enters the water when all water bottles are down and 

 measured at the time the messenger is dropped. 



start: Time of placing the first bottle on the wire. 



down: Time when all water bottles are on the wire and 

 lowered to proper wire depth. 



messenger: Time messenger is placed on the wire. 



up: Time cast of water bottles is started up. 



in: Time when all water bottles are in. 



Explanation of Entries in Columns 



cast: Frequently only one water bottle cast is made at 

 each station. If two or more are made, the point of 

 change is indicated in this column. 



SERIAL number: The serial numbers run consecutively, 

 one for all observations at each depth of each cast. 



METER wheel: Reading of the meter wheel at time 

 when each water bottle is placed on the wire (read from 

 bottom of column). The number in parentheses at 

 the top of the column is the final reading of the meter 

 wheel after lowering of all bottles. It differs from 

 the reading at zero wire length by the distance from 

 the sea surface to the height at which bottles are 

 placed on the wire. 



WIRE length: Wire length from the sea surface to each 

 water bottle when the cast is down. 



WATER bottle NUMBER: Serial number of each water 

 bottle. The surface water sample is usually taken 

 by bucket instead of water bottle. If so, it is 

 indicated by writing "BKT" at the top of the column 

 opposite zero wire length. 



LEFT THERMOMETER AND RIGHT THERMOMETER: Usually 



two deep sea reversing thermometers, each consisting 

 of a main and auxiliary thermometer, are attached 

 to each water bottle. The reversing thermometer on 

 the left is a protected one, that on the right may be 

 either protected or unprotected against the effect of 

 pressure. Under each thermometer the columns 

 indicate as follows: 



number: Serial number of the thermometer. Unpro- 

 tected thermometers are distinguished by a small 

 "u" placed after the thermometer number. 



MAIN (7", Ti): Temperature reading of the main 

 thermometer, designated by 7" (or Ti). 



Aux. ((, („): Temperature reading of the auxiliary 

 thermometer, designated by ( (or („). 



bottle numbers: Samples of the sea water at each 

 depth are stored in numbered glass bottles for 

 chemical analysis at a later time. A separate set of 

 bottles is used for determination of the amount of 

 each desired chemical, as indicated. 



CI: Numbers of the bottles in which water samples are 

 stored for determination of chloride content, and 

 hence salinity. 



O,: Numbers of the bottles in which water samples are 

 stored for determination of oxygen content. 



remarks: Any comment that may be useful in analysis 

 of the data. 



TEMPERATURE AND DEPTH CALCULA- 

 TIONS 



The second type of form, "Temperature and 

 Depth Calculations," shown in figure 23, is 

 devised for the processing of temperature and 

 depth data. Headings and column entries in 

 this form correspond to those of Form 1. The 

 equations involved and the construction of 

 processing aids are discussed in section D.2. 



Explanation of Entries in Columns 



SERIAL NUMBER AND WIRE LENGTH: See the Corre- 

 sponding column headings on "Form 1 — Observed 

 Sea Data." Entries in these columns and other 

 headings are copied directly from Form 1 and serve 

 as a reference for the data on the two forms. 



LEFT thermometer AND RIGHT THERMOMETER: The 



first three columns under each thermometer. Num- 

 ber, 7" or TV, and ( or i„, are copied directly from 

 the appropriate columns of Form 1. 

 C: Correction for thermal changes subsequent to 

 reversal, to be added algebraically to T" or T„'. C is 

 found by formula, slide rule, tables, or graphs. (See 

 sec, D. 2.) 



