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A figure falling into water inside a yellow warning triangle.
Also known as: Danger deep water sign, Fall into water warning, Water hazard sign
The deep water warning symbol is a warning sign — a black pictogram of a person falling into water on a yellow triangle — used at quaysides, locks, reservoirs and open water. It warns of a specific measured hazard rather than of water in general: a sudden edge, no shelving bottom, no handhold and no ladder. Where the risk is a fall rather than the depth, the closely related fall-into-water sign is used, and the two are often mounted together with a text panel naming the hazard.
Warns of a specific hazard rather than of water generally: a sudden edge with no shelving bottom, no handhold and no ladder, which is what makes falling in different from swimming.
Contexts: Public information, Navigation
Is expected to carry a text panel naming the hazard, in the same way the general warning triangle is: a bare triangle beside water tells a reader only that somebody was worried.
Contexts: Public information, Navigation
A figure tipping forward off a straight edge towards a pair of wavy lines below, drawn inside a triangle with a heavy border.
Both are warning signs in the same triangular class.