What is indicated by a white marker with an orange crossed diamond and black lettering?

A white marker with an orange crossed diamond and black lettering signifies an exclusion or keep-out area. This type of marker is used to denote zones where entry is prohibited for safety reasons, often due to submerged hazards, ongoing construction, or other dangerous conditions that could pose risks to boaters, swimmers, or other water users. It is crucial for maintaining safety on the water, as these markers inform individuals to stay away from potentially hazardous locations.

In contrast, the other options represent different purposes. A clear passage area would be marked differently to indicate safe navigation. A designated swimming area is typically marked by buoys or signs that specifically promote safe swimming zones, often using different colors or symbols. A boat ramp location usually has specific signage that identifies where to launch and retrieve boats, which may also differ from the marking in question. Understanding these distinctions is essential for safe and responsible navigation on Maine’s waters.