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Unit Aims, Objectives and Prerequisites
C.2.3 - Container securing systems

1. Unit Aims

This Unit is designed:

1. To explain why containers need to be secured during the sea voyage.
2. To describe the main types of securing devices used on container vessels.
3. To explain how container securing devices are used.

2. Unit Objectives

After completing this Unit, the learner will be able to:

1. State what stresses are experienced by containers during the sea voyage, and explain what forces and motions create those stresses.
2. State the necessity for and the functions of container securing systems.
3. Describe the various forms of cell guide systems and explain how they secure containers.
4. Name, distinguish between and recognize the main types of non-locking connector devices, and explain how they are used.
5. Name, distinguish between and recognize the main types of locking connector devices, and explain how they are used.
6. Name the three main lashing materials, describe and distinguish between the various attachment and tensioning devices that are used with them, and explain how they are used.
7. Name and distinguish between the four major categories of container securing devices.
8. Describe the securing systems used for the above-deck, non-cellular stowage of containers.
9. Interpret correctly lashing plans for above-deck non-cellular stows, and design a safe securing pattern for a given above-deck container bay plan.
10. Describe the securing systems used for the stowage of containers in the holds of bulk/container and general cargo/container vessels.
11. Interpret correctly lashing plans for below-deck, non-cellular stows, and design a safe securing pattern for a given below- deck container bay plan.
12. Outline the principal requirements of container securing systems for the vehicle decks of RoRo vessels, and describe the securing devices and patterns commonly adopted.
13. Describe the main securing systems used for uncontainerized, non-containerized and other ‘special’ stows on container vessels.
14. Define, recognize the best definition of, or distinguish between true and false statements concerning, the technical terms used in the Unit, as listed in sections 3 and 4 below.

3. Unit Prerequisites

It is assumed that trainees will, before starting this Unit, have completed successfully the following Units or will have demonstrated (for example by successfully completing the Tests for those Units) their understanding of the topics covered by them:

• Container terminal operations (C.1.1)
• Container ship loading and discharging operations (C.1.2)
• Container ship construction (C.2.1)
• Container construction (C.3.1)
• Container ship stowage plans (C.2.2)