# The Special Fish Report

## Albert W. Small (December 1944)

### Page 68

Tony Sale's
Codes and Ciphers

| previous page | next page | index page |

CX/MSS
TOP SECRET Special Fish Report Page 68

and therefore:

P(0 cross in the delta psi prime sum) = A0^2 + 4A1^2 + 6A2^2
+ 4A3^2 + A4^2 = .133

1/4 *P(1 in the sum) = 2(A0A1 + 3A1A2 + 3A2A3 + A3A4) = .051

1/6 *P(2 in the sum) = .050

1/4 *P(3 in the sum) = .064

P(4 in the sum) = .105

(All the above is also based on a motor dottage or 20.) Assuming the sum

of (Delta-D)A plus (Delta-D)B to be random if the two are wrongly overlapped:

(Delta-D)A + (Delta-D)B Decibans in favor
or(DeltaPSI)A + (DeltaPSI)B of correct setting
of go-back

Given (out of 4 impulses
only):

L0 3.3

L1 -0.8

L2 -0.9

L3 0.1

L4 2.3

It is also possible to make up tables taking into account the

limitation. Thus:

(Assuming limitation P(0 crosses in DeltaPSI1) = 1-a' + a'(l-b)^5 = .542 = B0
= x and M37
has 20 dots): 1/5 *P1 = .003 = B1

1/10*P2 = .007 = B2

1/10*P3 = .015 = B3

1/5 *P4 = .032 = B4

P5 = .069 = B5

| previous page | next page | index page |