What does 'daymark' refer to in relation to maritime buoys?

The term 'daymark' refers to visual identification features that are specifically designed for use in daylight. These features are essential for mariners to recognize navigational aids such as buoys during the day when visibility is sufficient. Daymarks can include distinctive colors, shapes, and patterns that make them easily identifiable from a distance, helping to ensure safe navigation. This is particularly important when distinguishing between different types of navigational markers, as various daymarks are indicative of specific navigational messages or hazards.

While nighttime identification features and sound signaling devices also play crucial roles in maritime navigation, they serve different purposes and are not classified as daymarks. Nighttime features, such as lights, are intended to assist mariners when visibility is low or non-existent, while sound signaling devices help provide information in conditions where visual cues may not be adequate. Marker lights for mooring pertain specifically to lighting used at mooring locations and do not qualify as daymarks. Thus, the definition that accurately describes daymarks is that they are visual daytime identification features.