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OICNW-1-2A

Fix by two bearings

Function: Navigation at the operational level

Competence Knowledge, Understanding & Proficiency Task

Plan and conduct a passage and determine position

A1.02 Terrestrial and coastal navigation

Ability to determine the ship’s position by use of:

  1. landmarks
  2. aids to navigation, including lighthouses, beacons and buoys
  3. dead reckoning, taking into account winds, tides, currents and estimated speed

Fix by two bearings

Assessed in: MT-4133 Bridge Resource Management

Condition

On a ship underway, or a full mission ship simulator, with land and aids to navigation in sight, using a standard bearing circle, alidade, or other device for taking bearings, and given a chart with a scale of no more than 1: 80,000.

Behavior

Determine the bearings of at least two charted objects and plot them.

Standard

  1. The position is within ± 0.2 nm of the assessor’s position.
  2. Crossing angles of bearings should be not less than 30° and not more than 160° between bearings.
  3. The bearings of objects abeam or close to the beam are observed first.
  4. The chart in use is the largest scale suitable for the waters being transited.