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EBCORDS AND REPORTS 



813 



When the alphabet is exhausted, double letters should be used in accordance with 

 3311. For colors, blue, purple, gi'een, and red should be given preference in the order 

 named. Yellow and black shall not be used. 



813. Information at Beginning of Day's Work 



Certain information relative to personnel engaged, instruments used and their ad- 

 justments, and other pertinent facts, which are important to a proper understanding 

 and application of the records, shall be entered at the beginning of each day's work. 

 Rubber stamps for this purpose have been standardized and shall be used. Entries 

 shall be made in every applicable space in each stamp. If, for special reason, additional 

 information is beheved desirable it should be entered just below the respective stamp or 

 in the margin where it will not be overlooked; no important information should be 

 omitted just because space has not been provided in one of the stamps. 



If a change occurs during the day to affect any of the information, a new entry 

 shall be made. If most of the information in one stamp is affected, use the stamp; 

 otherwise make the entry in the "Remarks" column. 



8131. Personnel 



The names of the personnel engaged in the surveying, and the numbers of the instru- 

 ments used by each, shall be entered in the appropriate spaces of Stamp No. 32, Per- 

 sonnel (fig. 175). Enter the last name in full, preceded by initials, unless the entry 

 is a repetition, when initials will suffice. The correctness of the instruments used 

 shall be verified and that fact noted after the number of each instrument. Figure 175 

 is a facsimile of Stamp No. 32 with the entries properly made. 



Figure 175. — Facsimile of Personnel stamp with entries properly made. 



When the operations are on a watch basis and most of the personnel are relieved at 

 regular intervals, the stamp shall be repeated at the change of each watch. For tem- 

 porary relief of members of the watch, or when only one person is relieved, appropriate 

 notes in the "Remarks" column will suffice. 



8132. Sounding Apparatus 



The kind and instrument number of the sounding apparatus shall be entered in the 

 appropriate spaces of rubber Stamp No. 33, Sounding Apparatus. Figure 176 shows 

 this stamp with properly made entries. All of the apparatus which may be used during 

 the day should be entered. 



The calibration velocity of an echo-sounding instrument used shall always be 

 entered, as well as the depths of the oscillator and hydrophone or transceiver, the setting 



