MMA Assessment OICNW-1-1A

Adjust a sextant

Condition

On a ship underway or in a laboratory with a clear horizon, given a standard marine sextant with a total index error of no more than 2’.

Performance requirement

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

Remove the adjustable sextant errors
  1. The errors are removed in the following order:
    1. Perpendicularity;
    2. Side error;
    3. Parallelism
  2. The index error is less than 1.0 minutes of arc.

Location

Assessed in MT‑4371 Sea Term IV: Marine Transportation.

References

  1. Table A-II/1 OICNW-A1.01
  2. NVIC 12-14 Task 1.1.A