English Maritime Terminology on Ship and Cargo Handling

Cargo Derricks Cargo derricks are essential pieces of shipboard equipment used to load and unload cargo, particularly on general cargo ships.

These structures situated above the ship's deck, are composed of a vertical mast, a horizontal boom, and a series of cables and winches.

Types of Cargo Derricks

Fixed Derricks:

• Permanently attached to the ship's structure.
• Limited in their reach and lifting capacity.
• Often used for smaller vessels or specific cargo handling tasks.

Movable Derricks:

• Can be moved along tracks on the deck, providing greater flexibility in cargo handling operations.
• Classified into two main types:
• Pillar Derricks: Supported by a single vertical mast.
• Jib Derricks: Supported by a mast and a jib, offering increased reach and lifting capacity.

Components of a Cargo Derrick

• Mast: The vertical support structure.
• Boom: The horizontal arm extending from the mast.
• Winch: The machinery that powers the lifting and lowering of the cargo.
• Guys: Cables that stabilize the derrick.
• Blocks and Tackle: Pulleys and ropes used to multiply lifting force.
• Hook: The attachment point for the cargo sling.

Safety Considerations

Safe cargo handling operations are paramount. To ensure safety, the following precautions must be taken:

• Proper Training: Crew members must be well-trained in the operation and maintenance of derricks.
• Regular Inspection: Derricks should undergo regular inspections to identify and rectify any defects.
• Safe Working Loads: Derricks must not be overloaded, and safe working load limits must be strictly adhered to.
• Weather Conditions: Adverse weather conditions can significantly impact cargo handling operations. Strong winds and heavy rain can make it dangerous to operate derricks.
• Emergency Procedures: Emergency procedures must be in place to respond to accidents and equipment failures.