Substitute flag
From Wikipedia, the free encyclopedia
Substitute flags are part of the international maritime signal flag set. Their purpose is to allow messages with duplicate characters to be signalled without the need for multiple sets of flags.
The four NATO substitute flags are as follows:
 |
 |
 |
 |
| First substitute | Second substitute | Third substitute | Fourth substitute |
To illustrate their use, here are some messages and the way they would be encoded:
| "N" |  |
||||
| "O" |  |
||||
| "NO" | |
|
|||
| "NON" | |
|
|
||
| "NOO" | |
|
|
||
| "NOON" | |
|
|
|
|
| "NONO" | |
|
|
|
|
| "NONON" | |
|
|
|
|
| "NONNN" | |
|
|
|
|
