sea-marks

Capped with brown crust, falling bluff inland, and sloping towards the main, where the usual stone-heaps act as sea-marks, this bank of yellowish-white coralline, measuring 310 metres by half that width, may be the remains of the bed in which the torrents carved out the port.

The Land of Midian 2003

Had they been sea-marks or light-houses, they would have been of more use to the invader than the natives, who could want no such directions of their own waters: for a watch-tower, a cottage on a hill would have been better, as it would have commanded a wider view.

A Journey to the Western Isles of Scotland 2003

They have to give certificates to properly-qualified pilots, attend to sea-marks, to the ballast of the Thames ships, and many other things.

Grace Darling Heroine of the Farne Islands Eva Hope

As the tides of barbarism were gradually driven back, the old sea-marks came one after another into view.

The River War An Account of the Reconquest of the Sudan Winston S. Churchill 1919

Up to that point the landmarks -- and and the sea-marks -- had been familiar.

The Street Called Straight Basil King 1893

He would have heard of channels and sandbanks, of natural features of the land useful for sea-marks, of villages and tribes and modes of barter and precautions to take: with the instructive tales about native chiefs dyed more or less blue, whose character for greediness, ferocity, or amiability must have been expounded to him with that capacity for vivid language which seems joined naturally to the shadiness of moral character and recklessness of disposition.

The Mirror of the Sea Joseph Conrad 1890

Capped with brown crust, falling bluff inland, and sloping towards the main, where the usual stone-heaps act as sea-marks, this bank of yellowish-white coralline, measuring 310 metres by half that width, may be the remains of the bed in which the torrents carved out the port.

The Land of Midian — Volume 2 Richard Francis Burton 1855

Mount St. Elias, insulated in the vast extent of the seas, or placed on the coasts of continents, serve as sea-marks to direct the pilot, when he has no means of determining the position of the vessel by the observation of the stars; everything which has a relation to the visibility of these natural seamarks, is interesting to the safety of navigation.

Travels to the Equinoctial Regions of America 1851

We were at that time near the mouth of the harbour, with Haslar Hospital seen over a low sandbank, and some odd-looking sea-marks on one side, and Southsea beach and the fortifications of Portsmouth, with a church tower and the houses of the town beyond.

James Braithwaite, the Supercargo The Story of his Adventures Ashore and Afloat William Henry Giles Kingston 1847

At Cape Chatham, on the south coast, these sea-marks are visible 300 feet above the present level of the ocean; and can be seen on the face of the rocks, in the hills at some distance from the coast.

The Bushman — Life in a New Country Edward Wilson Landor 1844