Assessment OICNW-3-1D

Determine range and bearing

Assessed in MT-3122 Radar Observer Certification


On an operational radar or radar simulator that meets the standards of 33 CFR 164.38 and other applicable national and international performance standards, with land and aids to navigation in range.

Performance Requirements

Behavior Standard
The student will: During assessment, the student shall, at a minimum:

Determine the range and bearing to an object.

  1. The candidate determined the range and bearing to an object selected by the assessor within 30 seconds.
  2. The candidate’s determination was within ± 0.2 nm of the assessor’s solution or ± 1% of the range scale in use.
  3. The candidate’s determination of the bearing was within ± 1°of the assessor’ s solution.

Supports Table A-II/1 officer in charge of a navigation watch

Competence Knowledge, Understanding & Proficiency Task

Use of radar and ARPA to maintain safety of navigation

A3.2 Ability to operate and to interpret and analyse information obtained from radar, including the following:

Performance, including:

  1. factors affecting performance and accuracy
  2. setting up and maintaining displays
  3. detection of misrepresentation of information, false echoes, sea return, etc., racons and SARTs

Use, including:

  1. range and bearing; course and speed of other ships; time and distance of closest approach of crossing, meeting overtaking ships
  2. identification of critical echoes; detecting course and speed changes of other ships; effect of changes in own ship’s course or speed or both
  3. application of the International Regulations for Preventing Collisions at Sea, 1972, as amended
  4. plotting techniques and relative- and true- motion concepts
  5. parallel indexing

Determine range and bearing

Published: 2016-10-28-04:00