PREPARATION OF CHARTS Bs-5 
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Figure B5 - 1. Entry of Additional and Multiple Ascent Levels. 
the level, thereby furnishing a number for the level in the missing stra- 
tum. The beginning and ending of missing or doubtful data will be indi- 
cated in the column captioned "Altitude of Significant Levels, or ''Re- 
marks" of the appropriate level by using one of the following abbrevi- 
ations: 
BMD to denote Begin Missing Data 
EMD to denote End Missing Data 
BMRH to denote Begin Missing Relative Humidity 
EMRH to denote End Missing Relative Humidity 
BDTD to denote Begin Doubtful Temperature Data 
EDTD to denote End Doubtful Temperature Data 
BDAD to denote Begin Doubtful Altitude Data 
These abbreviations will not be used elsewhere on Forms WBAN-31( ) 
or the recorder record. 
Moo (Ss) FMH#3 
