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OICNW-1-1A

Adjust a sextant

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

Adjust a sextant

Assessed in: MT-4371 Sea Term IV Deck

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'.

Behavior

Remove the adjustable sextant errors

Standard

  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.