How much horsepower is 1 ton bollard pull?

Master the Navigation, Seamanship, and Shiphandling (NSS) – Officer of the Deck (OOD) Phase 2 Exam with engaging flashcards and multiple choice questions, complete with hints and explanations. Prepare comprehensively for your test!

Multiple Choice

How much horsepower is 1 ton bollard pull?

The main idea is that in practical shiphandling, there’s a rough rule-of-thumb to relate bollard pull to engine horsepower: about 100 horsepower per ton of bollard pull. So, when a vessel can exert 1 ton of bollard pull, it’s typically equipped with propulsion around 100 HP in terms of usable shaft power, accounting for typical propeller efficiency and operating conditions. This rule is used for quick estimates by deck officers and engineers when planning towing or maneuvering tasks. The other numbers would imply far more or far less power than is normally needed to develop that level of thrust, given common propulsion efficiencies and speeds involved in bollard-pull operations.

The main idea is that in practical shiphandling, there’s a rough rule-of-thumb to relate bollard pull to engine horsepower: about 100 horsepower per ton of bollard pull. So, when a vessel can exert 1 ton of bollard pull, it’s typically equipped with propulsion around 100 HP in terms of usable shaft power, accounting for typical propeller efficiency and operating conditions. This rule is used for quick estimates by deck officers and engineers when planning towing or maneuvering tasks. The other numbers would imply far more or far less power than is normally needed to develop that level of thrust, given common propulsion efficiencies and speeds involved in bollard-pull operations.

More practice questions