Second substitute
ICS · Second substitute
In short: Repeats the second flag of the group it follows.
In plain English
Repeats the second flag of the group it follows.
Where you will really see it
Example: a group with a repeated second flag, like MAA, is sent as M, A and the second substitute.
Related flags
Keep going
- All signal flags: the search box and the full grid.
- Interactive mast: build your own hoist.
- Single-letter signals cheat sheet A to Z on one page.
The single-letter meanings are quoted 1:1 from Pub 102 International Code of Signals (NGA, public domain); the plain-English explanations are our own. Flag graphics: signal-flag-images (Unlicense).