Understanding how to calculate speed, distance, and time is essential for safe and efficient boating. Whether you're planning a short trip or a long voyage, these calculations will help you navigate the waters with confidence.

The fundamental formula to remember is:

Distance   =   Speed   ×   Time

From this, you can derive all formulas:


Practical Examples
Example 1: Calculating Distance
If you travel at a speed of 10 knots for 3 hours, the distance covered is:

Distance = 10knots × 3hours
Distance = 30 nautical miles



Example 2: Calculating Speed
If you travel 30 nautical miles in 2 hours, your speed is:

Speed = 2 hours / 30 nautical miles
Speed = 15 knots



Example 3: Calculating Time
If you need to cover 50 nautical miles at a speed of 25 knots, the time required is:

Time = 50 nautical miles / 25 knots
Time = 2 hours





Tips for Accurate Calculations

• Use Nautical Miles and Knots: In boating, distances are typically measured in nautical miles and speeds in knots (nautical miles per hour).
• Account for Currents and Wind: These can affect your actual speed and distance traveled.
• Use Reliable Instruments: Ensure your GPS and speedometer are accurate and well-maintained.

Tools and Resources

• GPS Devices: Modern GPS devices can provide real-time speed and distance data.
• Boating Apps: There are several apps available that can help with these calculations and provide additional navigation aids.