Which buoy would typically be marked by even numbers and the color red?

The buoy that is typically marked by even numbers and is colored red is the nun buoy. In navigational buoyage systems, nun buoys serve a specific purpose: they help indicate the boundaries of navigable channels and mark the right side of the channel as a vessel approaches from the sea. The even numbering system signifies its position as a lateral marker according to the IALA (International Association of Lighthouse Authorities) conventions.

Specifically, in the United States and other areas following similar rules, nun buoys are cone-shaped, allowing them to be easily identifiable. Additionally, the red coloring aligns with the rules that dictate color schemes for navigational aids.

Other buoy types mentioned serve different purposes. For example, cylindrical buoys do not have a specific numbering or color scheme and are not primarily used for channel marking. Safe water markers, which are typically identified by their red and white stripes and do not convey the lateral marking system, indicate that there is deep water all around the marker rather than channel boundaries. Daymarks refer to fixed navigational aids that are primarily for daytime visibility and can be of any shape or color, thus not directly aligning with the specific characteristics of the nun buoy.