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OICNW-3-1B

Switch display modes

Function: Navigation at the operational level

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

Switch display modes

Assessed in: MT-3122 Radar Observer Certification

Condition

On an operational radar or radar simulator that meets the standards of 33 CFR 164.38 and other applicable national and international performance standards.

Behavior

Switch the display from north up stabilized relative motion to true motion to head up, and state how to recognize the mode displayed.

Standard

Within 15 seconds:

  1. The display is switched from north up stabilized relative motion to true motion;
  2. The display is switched from true motion to head up; and,
  3. The candidate pointed to the location on the display of the information that indicates the mode displayed.