ABD Task 4.7.A

Demonstrate rigging and unrigging a bosun's chair

MMA Method

In order to satisfy NVIC 14-14 Task 4.7.A , MMA students must:

NVIC Method

See NVIC method.

STCW Competence Knowledge, Understanding, and Proficiency

Contribute to the safe operation of deck equipment and machinery

ABD-C1.2 Knowledge of the following procedures and ability to rig and unrig bosun’s chairs and staging
Condition Behavior Standard

On board ship or in a laboratory,

the candidate rigs and unrigs a bosun’s chair.

The candidate:

  1. Gathers all required materials;

  2. Inspects the bosun’s chair:

    a. The material has not been chafed;

    b. The material has not been compromised by the sun or chemicals;

    c. Strapping is undamaged; and

    d. Hardware is undamaged and unworn;

  3. Inspects the gantline to be used:

    a. The material has not been chafed; and

    b. The material has not been compromised by the sun or chemicals;

  4. Inspects that hardware is serviceable;

  5. Inspects the safety harness:

    a. The material has not been chafed;

    b. The material has not been compromised by the sun or chemicals;

    c. Strapping is undamaged; and

    d. Hardware is undamaged and unworn;

  6. Gathers personnel who will be assisting and briefs them on commands to be used and safety precautions;

  7. Rigs the gantline;

  8. Rigs the bosun’s chair:

    a. For a modern bosun’s chair, follow the manufacturer’s recommendations; or

    b. For an old style bosun’s chair, use a gantline;

  9. Tests the rigged bosun’s chair, staging, and gantlines by sitting in and/or standing on at the lowest point of the drop and bounce in the rig;

  10. When raised so that feet clear the deck, secures themselves and performs a small task with both hands;

  11. Frees the securing and lowers themselves to the deck; and

  12. Unrigs and stows all equipment per the manufacturer’s instructions.