In international maritime signaling, what does "Zulu" mean?

In international maritime signaling, "Zulu" refers to the condition where a vessel is dragging anchor. This signal is critical for alerting nearby vessels and mariners to a potentially dangerous situation, as it indicates that the ship is not maintaining its intended position and may be drifting due to lack of control. When a vessel signals that it is dragging anchor, it is essentially warning others to be cautious, since it may pose a collision risk or disrupt navigation in the area.

The other options represent different statuses or requests that are expressed through other signals, which are not synonymous with "Zulu." Therefore, "Zulu" is specifically understood within the context of maritime communication as an alert that immediate attention may be required due to the vessel's inability to remain securely anchored.