MMA Assessment OICNW-1-1C

Measure the altitude of three stars and accurately record the times of the observation of each star.

• Determine altitudes within ± 2 minutes of arc, after correction for index error, as compared with the altitude measured by the assessor at the same time;

• Record an observation time which is within ± 2 seconds of UTC of the time of observation as determined by the assessor.

Plot three lines of position and advance them to a common time.

Plot the resultant position of the star fix within 1.5 nm of the ship’s GPS position at the corresponding time, or within 3 nm of the assessor’s solution taken during the same time.