1. What is Boat Displacement?

Boat displacement refers to the volume of water displaced by a vessel's hull, which equals the weight of the boat according to Archimedes' principle. It represents the actual volume occupied by the submerged part of the hull.

2. How Does the Calculator Work?

The calculator uses the displacement formula:

Where:

• \( L \) — Length of the vessel (meters)
• \( B \) — Beam/width of the vessel (meters)
• \( D \) — Draft/depth of the vessel (meters)
• \( Block\ Coefficient \) — Dimensionless coefficient representing hull fullness

Explanation: The formula calculates the theoretical volume of the submerged hull, with the block coefficient accounting for the actual shape versus a perfect rectangular prism.

3. Importance of Displacement Calculation

Details: Accurate displacement calculation is crucial for determining vessel stability, load capacity, buoyancy, and compliance with maritime regulations. It helps in proper vessel design and safe operation.

4. Using the Calculator

Tips: Enter vessel length, beam, and draft in meters. The block coefficient typically ranges from 0.5 to 0.9 depending on hull shape. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is the block coefficient?
A: The block coefficient is a dimensionless number between 0 and 1 that represents how "full" the hull is. Higher values indicate fuller hulls.

Q2: How does displacement relate to boat weight?
A: Displacement volume in cubic meters multiplied by water density (approximately 1000 kg/m³ for fresh water) gives the boat's weight in kilograms.

Q3: What are typical block coefficient values?
A: For cargo ships: 0.8-0.85, for container ships: 0.55-0.65, for naval vessels: 0.45-0.55, for sailboats: 0.3-0.4.

Q4: Why is draft important in displacement calculation?
A: Draft determines how much of the hull is submerged, directly affecting the displaced water volume and thus the displacement calculation.

Q5: Can this calculator be used for all boat types?
A: This calculator works for displacement hulls. Planing hulls have different hydrodynamic characteristics and may require additional calculations.