KEYPUNCHING INSTRUCTIONS FOR THE DRIFT BOTTLE CODING FORM 
The Drift Bottle Coding Form is designed so that most of the numeric 
and alphabetic entries can be punched directly into the corresponding 
columns of the punch card. 
The correct column entries for certain over- 
punches, however, may not be readily determined from the coding form. 
A red dash, entered in a specific column of the coding form, generally 
indicates that the same column on the punch card should receive an x 
(or eleven) overpunch. 
Entries on the coding form which require x overpunches on the punch 
eard are as follows3 
Entry on Coding Form 
S after Column 27 
E after Column 32 
Red dash in Column 38 
Red dash in Column 49 
Red dash in Column 51 
after Column 56 
Im 
E after Column 61 
Red dash in Column 69 
Red dash in Column 70 
Red dash in Column 72 
Red dash in Column 75 
Explanation 
South latitude 
East longitude 
Distance from shore 
reported to tenths 
of a nautical mile 
Recovery month doubtful 
Recovery day doubtful 
South latitude 
East longitude 
Nautical miles drifted 
reported to tenths of 
a nautical mile 
Days adrift over 999 
Hours adrift 
Speed in knots 
all 
En on Punch Card 
as 
I> 
Ix 
Ips 
ae be 
Ibs 
overpunch 
overpunch 
overpunch 
overpunch 
overpunch 
overpunch 
overpunch 
overpunch 
overpunch 
overpunch 
overpunch 
Column 27 
Column 32 
Column 38 
Column 49 
Column 51 
Column 56 
Column 61 
Column 69 
Column 70 
Column 72 
Column 75 
