What sound signals indicate the presence of vessels engaged in towing operations?

Vessels engaged in towing operations are required to use specific sound signals to communicate their actions and intentions to other vessels in the area. The sound signal that indicates a vessel is towing is two prolonged blasts followed by one short blast. This sequence clearly communicates the nature of the operation to surrounding traffic, allowing other vessels to understand that a towing situation is present.

The use of this specific sound signal enhances safety on the water by ensuring that other vessels can take appropriate measures, such as adjusting their speed or course to avoid a potential collision with the towing vessel or its tow. The established sound signal conventions are important for maintaining navigational safety and facilitating clear communication among mariners.