sea-mark

A lighthouse serves as a sea-mark for ships at night.

Definition

1. Noun:
   • A navigational aid at sea: A "sea-mark" is a conspicuous object or structure on land or in the water that serves as a guide or reference point for ships and boats navigating coastal waters.
   • A beacon or landmark: Specifically, it can refer to a lighthouse, buoy, or other fixed marker used to indicate hazards, channels, or safe passages.

Usage Examples

• (A navigational landmark guiding boats.)
• (Fixed markers indicating underwater hazards.)
• (A visible reference point from the sea.)

Advanced Usage

• "to make a sea-mark": to use a distinct feature as a navigational guide.

  • The captain made the distant church spire his sea-mark for the final leg of the journey. (He used the spire as a visual reference.)

• "to be a sea-mark": to serve as a warning or example.

  • His tragic mistake became a sea-mark for other sailors to avoid similar errors. (A cautionary example.)

Variants and Related Words

• Seamark (n): alternative spelling, less common but interchangeable.

  • The chart indicated several seamarks along the coastline. (Navigational markers.)

• Landmark (n): a similar concept but on land; a prominent feature used for orientation.

  • The mountain peak was a famous landmark for hikers. (A terrestrial reference point.)

Synonyms

• Beacon: a light or signal used for navigation.
• Buoy: a floating marker anchored in water.
• Lighthouse: a tower with a bright light to guide ships.
• Navigational aid: any device or structure assisting in navigation.

Related Idioms

• "to set a sea-mark": to establish a clear point of reference.

  • The researchers set a sea-mark to monitor the tide's effect on the coastline. (They placed a fixed marker for measurement.)

• "beyond the sea-mark": outside the range of known navigational guides.

  • The ship drifted beyond the sea-mark into uncharted waters. (Into an area without clear references.)