On the Subject of Maritime Flags
When radio communication fails, signal flags may be the answer.
Identify the flags on the module. Decode a 7-flag callsign followed by a bearing of up to three digits. These are two separate messages.
Look up the callsign on the next page to obtain another bearing. Add both bearings and, if necessary, subtract 360 to obtain a bearing in the range 0–359.
Turn the compass so the red needle points in the direction containing this bearing according to the diagram on the left.
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
0
1
2
3
4
5
6
7
8
9
Repeat 1st flag of msg.
Repeat 2nd flag of msg.
Repeat 3rd flag of msg.
Repeat 4th flag of msg.