Final answer:
Different sound signals indicate specific actions when maneuvering around other vessels: one short blast indicates altering course to starboard.
Step-by-step explanation:
When maneuvering around other vessels, different sound signals indicate specific actions:
- One short blast: This signal is used when a vessel is altering its course to starboard (right) side.
- Two short blasts: This signal is used when a vessel is altering its course to port (left) side.
- Three short blasts: This signal is used when a vessel is astern or backing up.
- Five short blasts: This signal is used as a warning, typically indicating danger or an emergency situation.
These sound signals help vessels communicate and avoid collisions by indicating their intended actions.