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Vertical red and yellow stripes.
Also known as: Slippery surface flag, Oil flag
The signal flag meaning the track surface ahead is slippery from oil, water or debris.
Signals the track surface ahead is slippery from oil, water or debris.
Contexts: Public information
Held still rather than waved, and the distinction matters: a waved version is used in some codes for a small animal on the circuit, so the same cloth carries two meanings separated only by motion.
Contexts: Public information
A rectangular flag of vertical red and yellow stripes, held still at the post before the affected section.