Question 310Navigation General

The correct answer is C) composite group flashing (2 + 1). In the IALA Buoyage System, preferred-channel-to-port or preferred-channel-to-starboard buoys, when fitted with lights, will show a composite group flashing light (2 + 1). This means the light will display a group of two flashes followed by a single flash, repeating this pattern. This light characteristic helps mariners identify the preferred channel to navigate through. The other answer choices are incorrect because quick flashing (A) and long flashing (B) lights are not the standard for these types of navigation buoys, and "D" (D) is not a valid light characteristic in the IALA Buoyage System.