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P O C K E T     M O D E L     (   3"  /  8  cm  Diameter  )

JEPPESEN & CO., Denver, Colorado / USA   Model »CSG-1A«    (1965)
                                         P O C K E T    M O D E L
1st picture = 1st Side of the Slide
& CALCULATOR SIDE of the Flight Computer:
The  CALCULATOR  of the computer consists of a special circular
slide rule with 10..100 scales for multiplication and division.
The associated third scale is calibrated in hours and minutes.

 o Time, Ground Speed, Distance Problems
 o Fuel Consumption Problems
 o Altimeter Correction
 o Airspeed Correction Problem
 o Density Altitude
 o Drift Correction for Off Course Problems
 o Conversion Indexes
 o Common Multiplication and Division
 o Rate of Climb and Descent

2nd picture = WIND SIDE of the Flight Computer:
The  WIND SIDE  of the computer consists of a rotating azimuth
and a rectangular grid that slides up and down through the
azimuth. The sliding grid has two sides, a low speed and a high
speed side (see 2nd picture: lower w. "WAC" / STATUTE Miles and
upper w. "SECTIONAL" / STATUTE).  The azimuth circle rotates
freely and is graduated into 360°. The transparent portion is
frosted so that it can be written on with a pencil.

 o Solution of Wind Vector Triangles,
   Formulas for Wind Triangle Solution w.
    TC = True Course
    WCA = Wind Correction Angle
    TH = True Heading
    VAR = Variation
    DEV = Deviation
    CH = Compass Heading
    MC = Magnetic Course
    CC = Compass Course
 o Drift on Multiple Headings
 o Half Scale Wind Triangles
 o Radius of Action Wind Triangles
 o Off Course Problems

This  P O C K E T  Flight  Computer  looks  like  Model »CSG-2A«,
the  "NAVIGATOR"-Version, but smaller.  Also made of aluminum and
it came in a brown leather case with a ( 64 p.) instruction book.

                  Historical Remarks ...
© C.HAMANN   05/07/13