Third substitute

ICS · Third substitute

In short: Repeats the third flag of the group it follows.

Third substitute

In plain English

Repeats the third flag of the group it follows.

Where you will really see it

Example from Pub 102: the number 1100 is sent as one, the first substitute, zero and the third substitute. A customs curiosity: in Germany the third substitute serves as the customs flag (the Zollstander, § 4a ZollV). It is hoisted by a vessel entering the German customs area from abroad; flag Q is not accepted for that purpose there.

Related flags

First substitute
Second substitute
Answering pennant (AP)
Flag Q (Quebec) My vessel is "healthy" and I request free pratique.

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).