SailingJoy.com
the one stop resource directory for all your boating needs.Flag Substitutes
The ICS flag system utilizes four substitute flags numbered from 1 to 4. These flags are used to indicate a repetition of a flag already displayed on the hoist and thus eliminate the need of having multiple copies of each letter flag on board.
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Substitute 1
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Substitute 2
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Substitute 3
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Substitute 4
Here are some examples how the substitute flags are used:
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B
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O
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B
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Y
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B
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O
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O
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Y
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B
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B
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B
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B
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