NAVIGATION AND SEAMANSHIP Control stress, draught and stability of the ship

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1 1 of 5 level: 5 credit: 32 planned review date: June 1998 sub-field: purpose: entry information: accreditation option: moderation option: special notes: Maritime People credited with this unit standard are able to control the ballasting operation; maintain stability and stress; and prepare ballasting system and moveable dead weight items. Open. Evaluation of documentation and visit by NZQA and industry. A centrally established and directed moderation system has been established by the Maritime Qualifications New Zealand (Inc). Rules and regulations include: Standards of Training and Certification, and Watchkeeping, 1978, Chapter 3, Resolution 2 and 4; International Maritime Dangerous Goods Code; International Conference on Training and Certification of Seafarer, 1978, Chapter 3, Resolution 2 and 4; and International Convention Regarding the Discharge of Ballast Water. Ballast systems include: pumps, valves, lines and control systems. Stability and stress refers to static and dynamic transverse stability, longitudinal stability, bending moments, and shear forces.

2 2 of 5 Knowledge underpinning this unit standard include: trim and stability principles and calculations, ship construction, and exchange of ballast water. Elements and Performance Criteria element 1 Prepare ballast systems under the direction of the officer in charge of cargo operations. 1.1 Ballast requirements are pre-determined through consultation with the officer responsible for planning and co-ordinating the cargo operations. details on ballast requirements are obtained from - cargo loading and discharge plan, ship's drawings, indicators and instruments. 1.2 Ballast systems are prepared in accordance with the requirements specified in the cargo loading or discharge plan and established safety rules and regulations. 1.3 Ballast system checks are conducted to ensure their operational effectiveness and safety. 1.4 Defects in ballast system equipment are assessed and rectified where necessary or communicated to the officer planning the cargo operations to ensure any risk to personnel, equipment or is minimised.

3 3 of 5 element 2 Control ship's ballast operation during cargo operations under the direction of the officer in charge of cargo operations. operations include - loading and discharging; shifting of weights enroute as consumables are used or replenished. 2.1 The movement of ballast to, from and within is controlled in order to counteract the stresses placed on 's stability and structure during cargo operations, and to maintain in a stable condition in which cargo operations may be performed. 2.2 Trim, draughts and list are suitable to progress all ship operations safely and efficiently. operations include voyage. 2.3 The frequency and scope of stability and stress monitoring meet the requirements of the nature and speed of ship operations, and ensure stress and stability remain within 's operating and statutory limits at all times. 2.4 Action taken where weight distribution has or could lead to exceeding acceptable limits of stress or stability is prompt and designed to maximise ship safety. 2.5 Ballast operations are carried out in accordance with instructions received from the officer responsible for co-ordinating the cargo operations and the requirements of established safety rules and regulations. 2.6 Malfunctions in the ballast system are assessed and rectified where necessary, or communicated to the officer planning the cargo operations to ensure any risk to personnel, equipment or is minimised.

4 4 of 5 element 3 Maintain stability through the movement of dead weight items other than ballast. under the direction of the officer in charge of cargo operations. 3.1 The movement of dead weight items other than ballast to, from and within the ship is controlled in order to counteract the stresses placed on 's stability and structure during cargo operations, and to maintain in a stable condition in which cargo operations may be performed. 3.2 Trim, draughts and list are suitable to progress all ship operations safely and efficiently. operations include voyage. 3.3 The frequency and scope of stability and stress monitoring meet the requirements of the nature and speed of ship operations, and ensure stress and stability remain within 's operating and statutory limits at all times. 3.4 Action taken where weight distribution has or could lead to exceeding acceptable limits of stress or stability is prompt and designed to maximise ship safety. 3.5 Ballast operations are carried out in accordance with instructions received from the officer responsible for co-ordinating the cargo operations and the requirements of established safety rules and regulations. 3.6 Malfunctions in the dead weight items other than ballast system are assessed and rectified where necessary, or communicated to the officer planning the cargo operations to ensure any risk to personnel, equipment or is minimised.

5 5 of 5 Comments to: Maritime Qualifications New Zealand (Inc) Unit Standard Revision PO Box 160 WELLINGTON by June Please Note: Providers must be accredited by the Qualifications Authority before they can offer programmes of education and training assessed against unit standards. Accredited providers assessing against unit standards must engage with the moderation system that applies to those unit standards. [Please refer to relevant Plan ref: 0054]