1. What is the Ship Speed Equation?

The ship speed equation calculates speed in knots (nautical miles per hour) by dividing the distance traveled by the time taken. This fundamental navigation formula is essential for voyage planning and performance monitoring.

2. How Does the Calculator Work?

The calculator uses the basic speed equation:

Where:

• \( S \) — Speed in knots
• \( D \) — Distance in nautical miles
• \( T \) — Time in hours

Explanation: One knot equals one nautical mile per hour, the standard speed measurement in maritime and aviation contexts.

3. Importance of Speed Calculation

Details: Accurate speed calculation is crucial for navigation, fuel consumption estimation, arrival time prediction, and collision avoidance at sea.

4. Using the Calculator

Tips: Enter distance in nautical miles and time in hours. For partial hours, use decimals (e.g., 1.5 for 1 hour 30 minutes). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Why use nautical miles instead of statute miles?
A: Nautical miles (1,852 meters) are based on Earth's circumference and are the standard unit for marine and air navigation.

Q2: How accurate is this calculation?
A: The calculation is mathematically precise, but actual ship speed may vary due to currents, wind, and other factors.

Q3: Can I use this for aircraft speed?
A: Yes, aircraft speeds are also commonly measured in knots, though they may also use Mach number at high altitudes.

Q4: What's the difference between speed and velocity?
A: Speed is scalar (magnitude only), while velocity is vector (magnitude and direction). This calculator measures speed.

Q5: How do I convert knots to km/h or mph?
A: 1 knot = 1.852 km/h = 1.15078 mph. Multiply knot value by these factors for conversion.