OICNW-1-1G
Measure the altitude of at least 3 stars
Function: Navigation at the operational level
| Competence | Knowledge, Understanding & Proficiency | Task |
|---|---|---|
|
Plan and conduct a passage and determine position |
A1.01 Celestial Navigation Ability to use celestial bodies to determine the ship’s position |
Measure the altitude of at least 3 stars |
Assessed in: MT-4371 Sea Term IV Deck
Condition
Aboard a ship at sea, given a standard marine sextant, a clear horizon, a clear or partly cloudy sky, and an accurate time, during a single twilight.
Behavior
Measure the altitude of three stars and accurately record the times of the observation of each star.
Standard
- The altitude is within ± 0.5 minutes of arc, after correction for index error, as compared with the altitude measured by the assessor at the same time; and,
- The time is within ± 2 seconds of UTC at the time of observation as determined by the assessor.
