What does a day marker shaped like a red triangle and a green square indicate?

A day marker that is shaped like a red triangle and a green square is used to indicate channel direction, which is a crucial aspect of navigation on waterways. The red triangle typically signifies the right side of the channel when traveling upstream, while the green square indicates the left side. This system helps boaters understand the correct path to follow, ensuring safe passage through narrow or marked channels by providing clear visual guidance.

Channel markers are vital for maintaining safe navigation, as they help prevent boats from straying into shallow areas or obstacles. Understanding these markers allows boaters to make informed decisions while navigating, especially in unfamiliar waters. Properly interpreting these day markers is essential for avoiding hazards and ensuring the safety of vessels and their passengers.