What is the characteristic of the Georgetown Reach range daymark?

The Georgetown Reach range daymark is characterized by a distinctive design and marking system that aids navigation. Specifically, the correct option highlights the designation 'KRB', which refers to its unique identification in the marine navigational system.

In marine navigation, daymarks are visual markers that help mariners determine their position and navigate safely. The term 'KRB' likely indicates a specific type of marking or identifier used for the Georgetown Reach, which can include aspects like shape, color, or reflective properties.

Other choices represent various light characteristics associated with navigational aids. For example, options that specify different lighting patterns (such as Fl G 6s or Fl AL WR 10s) refer to specific flashing light sequences that help identify buoys or markers but do not describe the actual daymark of the Georgetown Reach.

By focusing on the unique identification marked as 'KRB', the correct answer emphasizes the daymark's role as a visual guide rather than its lighting characteristics. This understanding is crucial for navigators looking to comprehend the various aids to navigation available in the specific area of Georgetown Reach.