When altering course to port, what sound signal should be used?

• A. One long blast
• B. Three short blasts
• C. Two long blasts
• D. Two short blasts

Answer: (D)

When altering course to port, the appropriate sound signal is two short blasts. This signaling is part of the International Regulations for Preventing Collisions at Sea (COLREGs), which provide a standardized method of communication between vessels. The sound signals are designed to indicate a vessel's intentions to other vessels in a clear and consistent manner.

The use of two short blasts to indicate a turn to port is particularly important in preventing miscommunication while navigating in busy waterways or during limited visibility. This signal alerts other vessels nearby about the intended maneuver, allowing them to take appropriate action to avoid potential collisions. Understanding and utilizing these sound signals is critical for safe navigation and upholding maritime standards.