CHAPTER B5 
PREPARATION OF CHARTS 
Ibe Entering Data on WBAN-31( ). The form WBAN-31( ) willbe pre- 
pared ina clear, legible manner so that the forms may be microfilmed 
for use as a climatological record and data can be easily extracted for 
punched cards. The instructions contained in JB5-1.1thru1.3 prescribe 
the manner in which data are tobe entered on the forms to insure satis- 
factory computations, reproduction, and punching. 
1.1 Rubber Stamps. If available, rubber stamps will be used to enter 
identification data on WBAN-31A,B,C, recorder records and calibration 
charts. Rubber stamps may also be used for entering the date, the ob- 
server and verifier names, serial and ascensionnumbers, and other often 
used remarks such as "rechecked," ''second release," "begin missing 
data,'' etc. Stamped data should have sharp contrast with the paper. The 
letters of the stamp should be at least 3/16 of an inch in height. 
1.2 Type of Pencil tobe Used. Raobcharts willbe prepared neatly and 
legibly, and should appear black rather than gray. Although a well- 
sharpened No. 2H pencilis recommended, individual observers may pre- 
fer a slightly harder or softer lead. However, make certain the record is 
clear and has sharp contrast. 
1.3 Plotting and Entering Data in Red. The last level selected at or 
between 12.5 and 10 mb. will be replotted on WBAN-31C in red and all 
data from that point to 1 mb will be plotted in red. Changes made after 
transmission to the coded message and final rawin height and pressure 
will also be entered in red. (Weather Bureau stations will enter identi- 
fiers for significant punched card levels.) Useared pencil that will pro- 
vide a clear legible copy for microfilming andis capable of being erased, 
if necessary e.g., the carmine red Venus Unique pencil #1277 or its 
equivalent. 
1.4 Date and Time. Enter the date and time ofthe raob release on the 
recorder record and the calibration chart in terms of GMT. The time 
entry will be expressed in terms of the 24-hour clock and made to the 
nearest minute. Midnight will be expressed as 0000 and regarded as the 
beginning of the day. On WBAN-31( ), entries in the Date and Release 
Time block will be as follows: 
a. The first line will reflect the actual date and time of the raob 
release based upon local standard time. The time entry will 
be in terms of the 24-hour clock and made to the nearest 
Naty) IBS I FMH#3 
