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CARD FILE SYSTEM

A card record system was developed in the Aids to Navigation Section for each buoy in the District, arranged geographically in a visual card file with visual color signals indicating the general progress in buoy relief work and other pertinent information. On the face of the card was typed the name and the Light List number or page number of the buoy. The various activities or conditions were noted on the card according to the following outline as indicated on the attached key:

I. YEAR

The current year was typed below the heading "YEAR". Only one line was required for the year unless one or more of the following conditions existed:
a. More than one buoy installed in one year.
b. More than four sections in one year.
c. Extinguished and off-station same month.
d. Relieved, relocated, changed type of damage same month.

II. SERIAL NUMBER OF BUOY
Under this heading the serial numbers of the buoys were typed whether installed or relieved.

III. MONTH
Each line in this section was divided into 21 squares, one for each month of they year. Each square was divided into 4 triangles. By placing different colored triangles in the various positions, the section taken was indicated according to the following legend:

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