Assessment OICNW-3-1E

Determine risk of collision

Assessed in MT-3222 Automatic Radar Plotting Aids (ARPA)


On an operational radar or radar simulator that meets the standards of 33 CFR 164.38 and other applicable national and international performance standards, set on the 12 mile scale, with at least 5 vessels on the display.

Performance Requirements

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

Determine if risk of collision or danger of collision exists with all approaching vessels.

The candidate identified:

  1. All approaching vessels whose bearing did not change appreciably; and
  2. All vessels that had a CPA of less than 3 miles; and
  3. All determinations were made within 8 minutes of determining the initial range and bearing of each vessel or within 12 minutes overall.

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 risk of collision

Published: 2016-10-28-04:00