Final Answer:
The East Cardinal Mark signifies safe water to the east of the buoy. It is characterized by a light sequence of Fl (3) 10s, and its top marks consist of two Apeks arranged vertically, pointing away from each other. Identification is conveyed through letters.
Step-by-step explanation:
The East Cardinal Mark serves as a navigational aid, specifically indicating the presence of safe water on the eastern side of the buoy. The light characteristic, Fl (3) 10s, signifies a repeating sequence of three flashes, each lasting for 10 seconds. Mariners can easily recognize this distinctive light pattern to confirm their location relative to the mark.
The top marks of the East Cardinal Mark play a crucial role in its identification. The two Apeks positioned vertically above each other, pointing away from each other, serve as a visual indicator for sailors. This unique arrangement assists mariners in distinguishing the East Cardinal Mark from other navigational aids, enhancing safety and preventing navigational errors.
Furthermore, the use of letters for identification adds another layer of clarity. Letters on the East Cardinal Mark facilitate communication and understanding among mariners, ensuring that they correctly interpret the information provided by the mark. This adherence to a standardized identification system contributes to the overall effectiveness of maritime navigation aids.
In summary, the East Cardinal Mark's specific characteristics, including its light sequence, top marks, and identification letters, collectively provide sailors with essential information about the location of safe water, aiding them in making informed navigational decisions.