OICNW-1-5C
Determine magnetic compass deviation
Function: Navigation at the operational level
| Competence | Knowledge, Understanding & Proficiency | Task |
|---|---|---|
|
Plan and conduct a passage and determine position |
A1.07 Ability to determine errors of the magnetic and gyro-compasses, using celestial and terrestrial means, and to allow for such errors |
Determine magnetic compass deviation |
Assessed in: MT-4133 Bridge Resource Management
Condition
On a ship underway or a full mission ship simulator, using navigational or natural terrestrial ranges, using only a magnetic compass, and a chart with variation.
Behavior
Note the vessel's magnetic compass heading while aligned on the range and determine magnetic compass deviation.
Standard
- The magnetic heading is compared to the charted range bearing.
- The magnetic compass error is determined and properly labeled.
- Variation is determined from the chart.
- The deviation solution is ± 1° of the assessor’s solution.
- The deviation is correctly recorded in the compass record book.
