Assessment OICNW-3-2A

Set up and maintain an ARPA display

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


On an operational ARPA that meet the standards of 33 CFR 164.38 (or an ARPA simulator that meets applicable national and international performance standards for ARPA).

Performance Requirements

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

Set up and maintain the ARPA display.

Within three minutes, the candidate:

  1. Turned the power on;
  2. Initialized performance monitor;
  3. Noted error messages;
  4. Switched from standby to on;
  5. Selected the appropriate scale;
  6. Adjusted the gain control so that targets and sea return appeared;
  7. Adjusted the tune control (if the unit is not self tuning);
  8. Adjusted the brilliance control;
  9. Adjust the sea clutter and rain clutter controls to suppress the rain and sea clutter without losing targets.
  10. Display selected is north up stabilized, relative motion.
  11. Select proper gyro course and speed input.
  12. Select sea stabilized mode.

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

A3.4 Ability to operate and to interpret and analyze information obtained from ARPA, including:

  1. system performance and accuracy, tracking capabilities and limitations, and processing delays
  2. use of operational warnings and system tests
  3. methods of target acquisition and their limitations
  4. true and relative vectors, graphic representation of target information and danger areas
  5. deriving and analysing information, critical echoes, exclusion areas and trial manoeuvres

Set up and maintain an ARPA display

Published: 2016-10-28-04:00