Question

A ship has the following particulars: Displacement of 7620 tonnef in saltwater, 4.4 m mean draft, 170 m length between perpendiculars, beam of 11.3 m, waterplane area of 1497 m², and a midships section area of 47.2 m². Assume the length of the waterline is equal to the length between perpendiculars. (20 points) Determine the following: Block coefficient Cᵦ

Answer 1

The block coefficient (Cᵗ) of the ship is calculated by dividing the displacement by the product of length, beam, and mean draft, resulting in an approximate value of 0.72.

Step-by-step explanation:

To calculate the block coefficient (Cᵗ) for the ship, we use the formula:
Cᵗ = Displacement / (Length × Beam × Draft). Plugging in the values provided:

• Displacement = 7620 tonnef (which converts to 7620 cubic meters in saltwater, because 1 tonnef is equivalent to 1 cubic meter of saltwater)
• Length between perpendiculars = 170 m
• Beam = 11.3 m
• Mean draft = 4.4 m

Therefore, Cᵗ = 7620 m³ / (170 m × 11.3 m × 4.4 m) ≈ 0.72.
The block coefficient of approximately 0.72 indicates that the ship has a moderately fine shape, as typical values range from 0.6 for very fine ships to 0.8 for boxier ships.