Code Flag S "Sierra"
Nautical Flag S: Code Flag S Meaning & Signaling
The code flag s, also known as the sierra flag, is an essential maritime signal. In the International Code of Signals, the flag s means: "I am operating astern propulsion."
Properly displaying the nautical flag s provides a clear visual warning to surrounding vessels. Understanding the code flag s meaning is vital for safety when a ship is moving backwards.
