Assessment OICNW-3-2J

Trial Maneuver

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), with the ARPA on the 12 mile scale, with at least ten targets within 12 miles of the own ship.

Performance Requirements

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

Demonstrate the trial maneuver function.

  1. Access the trial maneuver mode;
  2. Enter course changes;
  3. Determine the course to steer to avoid all targets by a distance specified by the assessor, within one minute;
  4. Enter speed changes;
  5. Determine the speed necessary to avoid all targets by a distance specified by the assessor, within one minute and
  6. Return the display to real time.

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

Trial Maneuver

Published: 2016-10-28-04:00