Regulatory and informational markers can be easily identified by which characteristic?

Regulatory and informational markers are distinguished by their white color featuring orange geometric shapes. This specific color combination and design scheme are standardized to ensure that boaters can easily recognize these markers while on the water. White serves as a neutral background that enhances visibility, while orange shapes are used to convey important information, warnings, or restrictions. This standardization helps to promote safety and navigation efficiency, ensuring that all boaters understand and respond appropriately to the information presented.

The other options do not represent regulatory markers. For instance, while the colors red and green are commonly used in navigation aids, they are specifically associated with channel markers and navigational buoys rather than regulatory signs. Blue and green markings are often related to different kinds of information or navigational aids too, but they do not match the established characteristics of regulatory and informational markers. Thus, the distinctive use of white and orange in regulatory markers is essential for effective communication on the waterways.