Module 20: Mooring Equipment

Question 1

Learning Objectives

Answer 1

• Be able to identify the various mooring arrangements and equipment
• Be able to differentiate between types of fairleads
• Be able to differentiate between the different container securing arrangements

Question 2

Bollard

Answer 2

The mooring post found on the dock. Much stronger

Question 3

Bitt

Answer 3

The twin mooring post found on the deck of the ship. Consists of two vertical hollow steel cylinders attached to a rectangular base. The tops of the steel tubes have caps welded in place and the base of the bitt is welded to the deck.

Question 4

Rope Stopper

Answer 4

A smaller piece of rope used to temporarily hold the mooring line before it is removed from the winch and until it can be properly secured to the bitt.

Question 5

Fairleads

Answer 5

Used to guide mooring lines or wires out from the ship. Have a rounded surface to prevent excessive chafing or damage to the mooring lines.

Question 6

Open and Closed Fairleads

Answer 6

Open: lines can be placed into the slot provided in the top of the fairlead.
Bottom: line must be passed through the hole.
Cast steel and welded to the deck in locations where open rails are fitted.

Question 7

Ring Fairleads

Answer 7

AKA Panama fairlead. Made of cast steel. Usually found where bulwarks are fitted

Question 8

Roller Fairleads

Answer 8

Used in locations where a minimum of chafing is desired. The frame is cast steel and welded to the deck and/or bulwarks. May be:
- Open: vertical rollers only
- Multi-angle: 2 vertical and 2 horizontal

Question 9

Port Colborne Fairlead

Answer 9

Great Lakes and the St Lawrence Seaway. Consists of a revolving pulley that can turn as the ship moves through a lock. The fairlead can rotate inside the circular frame to prevent chafing.

Question 10

Pedestal Roller

Answer 10

AKA dead man roller, old man.
Used as directional control of a line leading from warping drum to a fairlead

Question 11

Mooring station area may include

Answer 11

• Assortments of fairleads and bitts
• Dedicated mooring winches and/or anchor windlasses
• Mooring control console
• Space for mooring lines
• Other equipment such as throwing lines, throwing rifles, etc.

Question 12

Mooring Line Control

Answer 12

A warping drum is used to handle mooring lines and is fitted to either a dedicated mooring winch or an anchor windlass. The drum is driven by an electric, hydraulic or steam motor. If fitted to an anchor windlass, need a dog clutch to disconnect the windlass chain from the motor to use the warping drum

Question 13

Container Lashing Arrangements

Answer 13

All containers must be secured against slippage and toppling, securing arrangement must not exceed the maximum load conditions of the container itself.
Containers can be stacked in vertical guide rails (cells) in the hull or on stacks/blocks on the upper deck. Containers are connected together and fixed to parts of the vessel.
When using cells, the containers are not attached together but cannot shift due to tight tolerances. May have removable guides allowing higher carrying capacity.

Question 14

Cable Stopper

Answer 14

Fitted to secure the anchor chain when riding at anchor. Take the load from the cable and relieve the strain on the windlass. Can also secure the anchor when housed.
Usually consists of two parallel vertical plates mounted on a base with a pivoting bar or pawl which drops down to bear on a chain link.
Can also take the form of a specially anchored turn buckle hooked up to securing cleats on the deck.