Definition

Noun: A type of buoy equipped to produce a sound signal, typically used as a navigational aid, especially to warn ships of hazards in conditions of low visibility such as at night or in fog.

Usage

An acoustic buoy is a maritime safety device. Its primary function is to emit an audible warning signal. This distinguishes it from buoys that rely solely on visual markers (like color or shape) or light signals.

Examples

• Noun:
  • The captain relied on the sound from the acoustic buoy to navigate safely through the fog.
  • Acoustic buoys are essential markers along rocky coastlines where visibility is often poor.

Advanced Usage

• "to mark a channel with acoustic buoys": To use sound-emitting buoys to define a safe passage for vessels.
  • The harbor entrance was clearly marked with acoustic buoys.

Variants and Related Words

• Bell buoy: A common type of acoustic buoy where the motion of the waves causes a bell to ring.
• Whistle buoy: A type of acoustic buoy that produces sound via a whistle activated by wave motion.
• Gong buoy: An acoustic buoy fitted with one or more gongs that sound as the buoy moves.
• Nun buoy: A conical-shaped buoy, which may be fitted with an acoustic signal.
• Can buoy: A cylindrical-shaped buoy, which may be fitted with an acoustic signal.

Synonyms

• Audible buoy
• Sound buoy
• Signal buoy (when context implies an auditory signal)

Related Terms

• Navigational aid (navaid): A broader term for any device, including buoys, beacons, and signals, that assists in marine navigation.
• Fog signal: A general term for any device, including those on buoys, that emits sound to warn of dangers in fog.

Noun

1. a buoy that can be heard (at night)