An AIS symbol with an "X" through the ship symbol indicates what?

An AIS symbol with an "X" through the ship symbol indicates what?

• A. A vessel under way
• B. A lost target
• C. A stationary target
• D. A vessel that is moored

Answer: (B)

An AIS symbol featuring an "X" through the ship symbol is indicative of a lost target. This marking signifies that the vessel is no longer able to be tracked or has lost its position data for various reasons. When an AIS system cannot receive or verify data from a vessel, it marks that vessel in this way to alert users that the information being displayed is unreliable, which can be crucial for navigational safety. Understanding this symbol helps mariners to distinguish between vessels that are actively transmitting their positions and those that are not, allowing for more informed decision-making in navigation.

An AIS symbol featuring an "X" through the ship symbol is indicative of a lost target. This marking signifies that the vessel is no longer able to be tracked or has lost its position data for various reasons. When an AIS system cannot receive or verify data from a vessel, it marks that vessel in this way to alert users that the information being displayed is unreliable, which can be crucial for navigational safety. Understanding this symbol helps mariners to distinguish between vessels that are actively transmitting their positions and those that are not, allowing for more informed decision-making in navigation.