BOLLARD PULL Meaning and
Definition
-
Bollard pull is a term that is predominantly used in the maritime industry and refers to the pulling or towing capacity of a vessel. It is defined as the maximum force or strength that a vessel can exert in a straight line when pulling a bollard, which is a sturdy vertical post used for mooring ships or securing ropes.
The bollard pull is determined through a series of tests where the vessel is connected to a bollard and its propulsion system is engaged in reverse at maximum power. This allows the vessel to exert its full pulling force, which is typically measured in metric tons or kiloNewtons (kN).
The bollard pull is influenced by various factors such as the vessel's engine power, design, weight, and water conditions. It is an important metric to determine the towing capabilities and overall maneuverability of a vessel. The higher the bollard pull, the stronger the vessel's capacity to tow or push objects.
Bollard pull is particularly critical for vessels involved in activities such as tugboats, offshore supply vessels, and salvage operations where the ability to exert significant pulling force is vital. It is also significant for docking and maneuvering in tight spaces, where a higher bollard pull ensures greater control and stability. The bollard pull specification of a vessel is typically listed in its technical specifications and is crucial information for naval architects, ship owners, and operators.
Etymology of BOLLARD PULL
The word "bollard" comes from the Middle English term "bole", which means a tree trunk. In maritime terminology, a bollard is a post or pillar on a dock or ship used for mooring purposes.
The term "pull" refers to the force exerted in a specific direction.
When combined, "bollard pull" refers to the pulling or towing capacity of a vessel, particularly in terms of the force it can exert on a mooring bollard. It is a measure of the ship's pulling power, often used to determine its ability to tow or push other vessels, equipment, or structures.
