block coefficient: meaning, definition, pronunciation and examples
C2Technical/Specialist
Quick answer
What does “block coefficient” mean?
A dimensionless number expressing the ratio of the volume of a ship's hull below the waterline to the volume of a rectangular block with the same length, breadth, and draught.
Audio
Pronunciation
Definition
Meaning and Definition
A dimensionless number expressing the ratio of the volume of a ship's hull below the waterline to the volume of a rectangular block with the same length, breadth, and draught.
In naval architecture, a key design parameter quantifying how 'full' or 'fine' a ship's underwater hull shape is; a measure of displacement efficiency.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling follows national conventions ('centre' vs. 'center' in surrounding text).
Connotations
None beyond the technical definition.
Frequency
Equally rare and confined to naval architecture, shipbuilding, and marine engineering contexts in both regions.
Grammar
How to Use “block coefficient” in a Sentence
The block coefficient of [ship name/type] is...[Ship name/type] has a block coefficient of...A high/low block coefficient indicates...Vocabulary
Collocations
Examples
Examples of “block coefficient” in a Sentence
adjective
British English
- The block-coefficient value is critical for powering estimates.
American English
- Block-coefficient calculations are performed early in the design spiral.
Usage
Meaning in Context
Business
Rare; used only in very specific maritime procurement or shipping efficiency reports.
Academic
Core term in naval architecture, marine engineering, and hydrodynamic research papers.
Everyday
Virtually never used.
Technical
Primary and precise usage in ship design, hydrodynamic modeling, and vessel performance analysis.
Vocabulary
Synonyms of “block coefficient”
Neutral
Weak
Watch out
Common Mistakes When Using “block coefficient”
- Using plural 'block coefficients' when referring to a single ship's property.
- Confusing it with 'prismatic coefficient' or 'midship coefficient', which are related but distinct naval architectural terms.
- Pronouncing 'coefficient' with the stress on the first syllable (/ˈkoʊəfɪʃənt/). The standard stress is on the third syllable (/ˌkoʊəˈfɪʃənt/).
FAQ
Frequently Asked Questions
Extremely rarely. Its primary and almost exclusive application is in naval architecture for waterborne vessels. It is not used for aircraft or automobiles.
It ranges from about 0.35 for very slender racing yachts to over 0.90 for some large, full-form bulk carriers or inland barges. Most merchant ships fall between 0.70 and 0.85.
It is calculated as Cb = ∇ / (L * B * T), where ∇ is the volume of displacement, L is the waterline length, B is the beam (breadth), and T is the draught (depth underwater).
For general English learners, it is a low-priority, specialised term. It is crucial only for learners in specific fields like marine engineering, naval architecture, or maritime logistics, where it is a fundamental technical concept.
A dimensionless number expressing the ratio of the volume of a ship's hull below the waterline to the volume of a rectangular block with the same length, breadth, and draught.
Block coefficient is usually technical/specialist in register.
Block coefficient: in British English it is pronounced /ˌblɒk kəʊɪˈfɪʃ(ə)nt/, and in American English it is pronounced /ˌblɑːk ˌkoʊəˈfɪʃənt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Imagine a ship inside a BLOCK of water its own size. The COEFFICIENT tells you what fraction of that block the ship actually fills.
Conceptual Metaphor
SHIP HULL IS A SOLID GEOMETRIC SHAPE (compared to a perfect rectangular block).
Practice
Quiz
What does a block coefficient of 1.0 theoretically imply?