noun
- navigational aids or landmarks visible from the sea that help ships determine their position or safe passage
Usage: nautical; plural form
Examples
- The lighthouse served as one of the most important seamarks along the rocky coastline.
- Ancient mariners relied on natural seamarks like distinctive rock formations to navigate safely.
- Modern GPS has reduced dependence on traditional seamarks, but they remain crucial backup navigation tools.
- The harbor authority maintains several seamarks to guide vessels through the narrow channel.
- Buoys and beacons are common types of artificial seamarks used in busy shipping lanes.
- Sailors studied their charts carefully, noting all the seamarks they would encounter on their voyage.