(2) Tables A-1 through A-4 in Appendix A (pages A-1 through A-4) provide the logarithms of

numbers. These tables are not typical logarithm tables. The tables consist of two columns marked A and

B.

or b .

Column A is the quotient of

EXAMPLE: A reading of 200 was taken at 0700 and another reading of 15 was taken at 1130. H-hour

was determined to be 050600Z. What is the decay factor *n*? Thus,

200

log

15 log 13.3 log 1.124 1.7

4.5

log 4.5

0.653

log

1

The logarithm of either quotient is found in Column B. Note that Column A is given to one decimal place

only. To use the table, round the quotient to the nearest single decimal place and locate that number in

Column A. Read the logarithm of that number in Column B.

EXAMPLE: 10 divided by 6 equals 1.666666667. This number is not listed in Column A. Therefore,

round to 1.7. Enter Column A with 1.7. Determine the logarithm from Column B to be 0.230.

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