Question 227Navigation General

The correct answer is D) period. The Light List, which is published by the U.S. Coast Guard, provides information on various navigational aids, including lighted aids. The period of a lighted aid refers to the time required for the aid to complete a full cycle of light changes, such as flashing, occulting, or other patterns. This information is an important characteristic listed in the Light List, as it helps mariners understand the timing and behavior of the lighted aid, which is crucial for safe navigation. The other answer choices are incorrect because frequency refers to the number of cycles per unit of time, set refers to the orientation or position of the aid, and function refers to the purpose or type of the navigational aid, rather than the time required for a full light cycle.