A daymark or a day marker is a structure such as a tower

Tower

A tower is a tall structure, usually taller than it is wide, often by a significant margin. Towers are distinguished from masts by their lack of guy-wires....

 constructed on land as an aid to navigation by sailors. While similar in concept to a lighthouse

Lighthouse

A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses or, in older times, from a fire, and used as an aid to navigation for maritime pilots at sea or on inland waterways....

, a daymark does not have a light and so is usually only visible during daylight hours. Some disused lighthouses remain useful by serving as daymarks.

Examples of daymarks can be found at Walton-on-the-Naze

Walton-on-the-Naze

Walton-on-the-Naze is a small town in Essex, England, on the North Sea coast in the Tendring district. It is north of Clacton and south of the port of Harwich. It abuts Frinton-on-Sea to the south, and is part of the parish of Frinton and Walton. It is a resort town, with a permanent population of...

 and St Martin's, Isles of Scilly

St Martin's, Isles of Scilly

St Martin's is the northernmost populated island of the Isles of Scilly, United Kingdom. It has an area of .-Description:There are three main settlements on the island - Higher Town, Middle Town and Lower Town - in addition to a number of scattered farms and cottages, with a total population of...

.

The term "daymark" may also refer to the pattern in which a lighthouse is painted, making it more easily identifiable during the day.

See also

• Barber's pole
  Barber's pole
  A barber's pole is a type of sign used by barbers to signify the place or shop where they perform their craft. The trade sign is, by a tradition dating back to the Middle Ages, a staff or pole with a helix of colored stripes...
  
  
• Buoy
  Buoy
  A buoy is a floating device that can have many different purposes. It can be anchored or allowed to drift. The word, of Old French or Middle Dutch origin, is now most commonly in UK English, although some orthoepists have traditionally prescribed the pronunciation...
  
  
• Day beacon
  Day beacon
  A day beacon is an unlighted nautical sea mark. Typically, day beacons mark channels whose key points are marked by lighted buoys. Day beacons may also mark smaller navigable routes in their entirety. They are the most common aid to nautical navigation in shallow water as they are relatively...
  
  
• Landmark
  Landmark
  This is a list of landmarks around the world.Landmarks may be split into two categories - natural phenomena and man-made features, like buildings, bridges, statues, public squares and so forth...
  
  
• Sea mark
  Sea mark
  A sea mark, also seamark and navigation mark, is a form of aid to navigation and pilotage aid which identifies the approximate position of a maritime channel, hazard and administrative area to allow boats, ships and seaplanes to navigate safely....
  
  
• Lighthouse
  Lighthouse
  A lighthouse is a tower, building, or other type of structure designed to emit light from a system of lamps and lenses or, in older times, from a fire, and used as an aid to navigation for maritime pilots at sea or on inland waterways....
  
  
• Lightvessel
  Lightvessel
  A lightvessel, or lightship, is a ship which acts as a lighthouse. They are used in waters that are too deep or otherwise unsuitable for lighthouse construction...