QUAPOS


  1. surveyed: the position(s) was(were) determined by the operation of making measurements for determining the relative position of points on, above or beneath the earth's surface. Survey implies a regular, controlled survey of any date. (adapted from IHO Dictionary, S-32, 5195, & IHO Chart Specifications, M-4, 175.2)
  2. unsurveyed: survey data is does not exist or is very poor. (adapted from IHO Dictionary, S-32, 5732)
  3. inadequately surveyed: position data is of a very poor quality. (adapted from IHO Dictionary, S-32, 5732)
  4. approximate: a position that is considered to be less than third-order accuracy, but is generally considered to be within 30.5 metres of its correct geographic location. Also may apply to an object whose position does not remain fixed. (adapted from IHO Dictionary, S-32, 213, 3967, & IHO Specifications, M-4, 424.1)
  5. position doubtful: an object whose position has been reported but which is considered to be doubtful.
  6. unreliable: an object's position obtained from questionable or unreliable data.
  7. reported (not surveyed): an object whose position has been reported and its position confirmed by some means other than a formal survey such as an independent report of the same object.
  8. reported (not confirmed): an object whose position has been reported and its position has not been confirmed.
  9. estimated: the most probable position of an object determined from incomplete data or data of questionable accuracy. (adapted from IHO Dictionary, S-32, 3960) precisely known: a position that is of a known value, such as the position of an anchor berth or other defined object.
  10. precisely known: a position that is of a known value, such as the position of an anchor berth or other defined object.
  11. calculated: a position that is computed from data.