ABD Task 5.5.D

Adjust tension on mooring lines

MMA Method

In order to satisfy NVIC 14-14 Task 5.5.D , MMA students must:

NVIC Method

See NVIC method.

STCW Competence Knowledge, Understanding, and Proficiency

Apply occupational health and safety precautions

ABD-C2.1 Working knowledge of safe working practices and personal shipboard safety including line handling

Condition Behavior Standard

On board ship moored alongside a dock, or in a laboratory,

the candidate adjusts the tension on mooring lines and wires.


The candidate:

  1. Adjusts the tension of lines using the ship’s winches;
  2. Pays out mooring wires, under load, in a controlled manner;
  3. Pays out mooring lines, on bitts, under load, in a controlled manner;
  4. Takes in slack on mooring wires without sufficient tension; and
  5. Takes in slack on mooring lines, on bitts and cleats, so that they have sufficient tension.

NOTE: The above is performed with regard to personnel working in the area, weather (both present and anticipated), cargo movement, and limitations of the ship’s operations. When heaving, appropriate safety precautions are observed, including proper number of turns on the capstan, hand placement, body position, and avoiding the piling up of line.