FORE & AFT MARINE
International Marine Signal Flags
The following flags are international signals used by ships at sea. They can be used to spell out short messages, or more commonly, used individually or in combination .
Alphabet Flags
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;
Answering Pennant
Numeric Pennants
0;
1; 
2; 
3;
4; 
5;
6; 
7;
8; 
9;
Substitute Pennants
substitute 1; 
substitute 2; 
substitute 3;
The first substitute repeats the upper flag or pennant of a hoist, the second substitute repeats the second flag or pennant, and so on.