COLREGs Rules of the Road 2025 – 400 Free Practice Questions to Pass the Exam

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What signal indicates that a vessel is altering course to port or intends to leave another vessel to starboard?

Three short blasts

The correct signal indicating that a vessel is altering course to port or intends to leave another vessel to starboard is three short blasts. This signal is part of the sound signaling conventions as defined by the COLREGs, which dictate the communication between vessels to ensure safe navigation.

When a vessel emits three short blasts, it is conveying its intention to alter its course to port, providing critical information to nearby vessels about its movement. This helps prevent collisions by allowing other vessels to understand what to expect from the signaling vessel's maneuvering.

Understanding this signal is crucial for safe maritime operation, as it fosters clarity and coordination among vessels navigating in proximity to one another. It is essential for mariners to be familiar with these sound signals to navigate effectively and comply with the conventions that govern sea traffic.

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One long blast

One short blast

Two short blasts

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