Regulatory and informational markers can be easily identified through which features?

Regulatory and informational markers are designed to convey important information to boaters about navigational rules, hazards, and other critical boating information. The correct answer relates to the use of white color with orange geometric shapes, which is a standard within the navigation system.

White markers with orange geometric shapes are commonly used to indicate regulatory areas, such as "No Wake" zones or areas where certain activities are prohibited. The orange shapes provide clear visual cues about the nature of the regulations in place, making it easier for boaters to understand and comply with the rules.

In contrast, the other options describe different types of markers that serve other purposes. For example, markers that are yellow may indicate caution areas but do not represent regulatory or informational markers specifically. Red markers typically indicate navigational channels, while green markers serve to show the left side of the channel when returning from sea. Thus, understanding these color codes and their corresponding shapes helps boaters navigate safely and adhere to the regulations of waterways.