A vessel underway sounds one short blast. This signal indicates the vessel—

A vessel underway sounds one short blast. This signal indicates the vessel—

• A. is altering course to port.
• B. is altering course to starboard.
• C. is not under command.
• D. is at anchor.

Answer: (B)

Understanding how sound signals convey a vessel’s next move helps you predict and avoid collisions. A single short blast from a vessel that is underway means it is altering its course to starboard (to the right). This signal tells nearby vessels that the signaling boat intends to turn to its right, so others can adjust accordingly to maintain safe separation. The other options describe different signals or statuses, such as altering course to port (which would be two short blasts) or being not under command or at anchor, which are indicated by other signal patterns. So, a lone short blast specifically communicates a turn to starboard.

Understanding how sound signals convey a vessel’s next move helps you predict and avoid collisions. A single short blast from a vessel that is underway means it is altering its course to starboard (to the right). This signal tells nearby vessels that the signaling boat intends to turn to its right, so others can adjust accordingly to maintain safe separation. The other options describe different signals or statuses, such as altering course to port (which would be two short blasts) or being not under command or at anchor, which are indicated by other signal patterns. So, a lone short blast specifically communicates a turn to starboard.