What color is a safe water mark?

A safe water mark is designed to indicate safe waters and direct mariners into deeper channels. The correct answer is red and white vertically striped, which is the standard identification for this type of navigational aid. The vertical stripes symbolize a safe passage; when mariners see these marks, they know that there are no dangers in that vicinity and they can proceed without worry about shallow waters or obstacles.

In contrast, other color combinations such as green horizontally striped, red vertically striped, or yellow and black striped serve different purposes in the navigation system. Green markings are typically used for lateral marks indicating the port side of channels, while solid red marks indicate the starboard side. The yellow and black striped marks are often used to indicate caution, suggesting a potential hazard nearby. Understanding these distinctions is crucial for maritime navigation safety.