1. cairn: a mound of stones, usually conical or pyramidal, raised as a landmark or to designate a point of importance in surveying. (IHO Dictionary, S-32, 5th Edition, 601)
  2. cemetery: an area of land for burying the dead.
  3. chimney: a vertical structure containing a passage or flue for discharging smoke and gases. (Digital Geographic Information Standard - DIGEST)
  4. dish aerial: a parabolic aerial for the receipt and transmission of high frequency radio signals. (IHO Dictionary, S-32, 5th Edition, 1400)
  5. flagstaff(flagpole): a staff or pole on which flags are raised. (Digital Geographic Information Standard -DIGEST 1.28)
  6. flare stack: a tall structure used for burning-off waste oil or gas. (IHO Dictionary, S-32, 5th Edition, 1836). Normally showing a flame and located at refineries (IHO Chart specifications, S-4).
  7. mast: a straight vertical piece of timber or a hollow cylinder. (adapted from Digital Geographic Information Standard - DIGEST)
  8. wind sock: a tapered fabric sleeve mounted so as to catch and swing with the wind, thus indicating the wind direction. (Navigation dictionary, US National Oceanic and Atmospheric Administration - NOAA, 1969)
  9. monument: a structure erected or maintained as a memorial to a person or event. (Digital Geographic Information Standard - DIGEST)
  10. column (pillar): a cylindrical or slightly tapering body of considerably greater length than diameter erected vertically. (Oxford English Dictionary)
  11. memorial plaque: a slab of metal, usually ornamented, erected as a memorial to a person or event.
  12. obelisk: a tapering shaft usually of stone or concrete, square or rectangular in section, with a pyramidal apex. (Adapted from Oxford English Dictionary)
  13. statue: a representation of a human, animal or fantasy figure in marble, bronze, etc.
  14. cross: a monument, or other structure in form of a cross. (Funk & Wagnalls Dictionary)
  15. dome: a landmark comprising a hemispherical or spheroidal shaped structure (adapted from the Macquarie Dictionary).
  16. radar scanner: a device used for directing a radar beam through a search pattern (adapted from Navigation Dictionary, US National Oceanic and Atmospheric Administration -NOAA, 1969)
  17. tower: a relatively tall structure which may be used for observation, support, storage or communication etc. (Digital Geographic Information Working Group -DGIWG, Oct. 1987)
  18. windmill: a wind driven system of vanes attached to a tower like structure (excluding wind-generated power plants). (Digital Geographic Information Standard - DIGEST)
  19. windmotor: a modern structure for the use of windpower. (IHO Chart Specifications, S-4)
  20. spire/minaret: a tall conical or pyramid-shaped structure often built on the roof or tower of a building, especially a church or mosque. (adapted from The New Shorter Oxford English Dictionary, 1993)
  21. large rock or boulder on land: an isolated rocky formation or a single large stone (IHO Dictionary, S-32, 5th Edition 4415)
  22. rock pinnacle: high tower or spire-shaped pillar of rock, alone or cresting a summit (adapted from IHO Dictionary, S-32, 5th Edition 3852)