🧭 Nautical Route Calculator: Plot Your Course Like a Real Sailor

“Every degree matters when you're crossing an ocean.”

⚓ What Is the Nautical Route Calculator?

Ever wondered how far it is from Miami to Bimini, or which heading to steer to hit your next anchorage? This tool’s for you.

The Nautical Route Calculator is a free, sailor-built tool that helps you calculate distance, bearing, and ETA (Estimated Time of Arrival) between any two coordinates—just by plugging in your speed.

Whether you're a weekend warrior or a salty passagemaker, having a dead-simple calculator at hand keeps planning clear and crossings safe.

🌍 The Science Behind It: The Haversine Formula

Ever heard of the Haversine formula? It was developed in 1984 by R. W. Sinnott and is trusted by navigators worldwide to compute the shortest path between two points on a sphere—aka, our salty blue planet.

Why it matters: Because the Earth’s not flat (sorry, conspiracy crew), and the shortest distance isn’t a straight line—it’s a curve.

The calculator shows you your true distance and bearing, “as the albatross flies.”

🛟 Why Use a Standalone Tool?

Yeah, chartplotters and apps are great—until they fail. Every sailor knows:

🧭 Redundancy = safety at sea.

• Backup: If your electronics go dark, this tool won’t.

• Planning: Perfect for use at anchor, in the marina, or offline offshore.

• Teaching: Great for new crew learning to navigate.

• Simplicity: No logins. No ads. No BS. Just pure nav.

Sometimes the best tech... is the simplest one.

👨✈️ Who’s Using This Tool?

• Offshore skippers planning passages

• Instructors teaching coastal nav

• Sailing schools training new crew

• Cruisers double-checking the chartplotter

• DIY navigators plotting their next escape

If you're one of us—you’ll love this.

⚙️ How to Use It

1. Enter your starting latitude and longitude
   (Example: 25.7706, -80.1355 = Miami Beach Marina)

2. Enter your destination coordinates
   (Example: 25.7260, -79.2970 = Alice Town, Bimini)

3. Input your average speed in knots

4. Click “Calculate”

5. Read your results:

📏 Distance – in nautical miles (NM)
🧭 Bearing – initial compass heading (°)
⏱ ETA – time at your selected speed

🌴 Example: Miami to Bimini

• Start: Miami Beach Marina (25.7706, -80.1355)

• End: Alice Town, Bimini (25.7260, -79.2970)

• Speed: 6 knots

Results:
📏 Distance: 45.42 NM
🧭 Bearing: 93.2°
⏱ ETA: 7h 34m

📐 How to Read the Results

• Distance (NM): Shortest route across Earth’s surface

• Bearing (°): Compass heading to your target

• ETA: Time to arrival—assuming flat seas, no current, no nonsense

🌀 Heads up: Real-world sailing is messier. Wind, current, or a stop for a beer can shift your timing.

❓ FAQ

Q: What’s a nautical mile?
A: One nautical mile = 1.852 km or 1.15 land miles. It’s the standard unit in marine navigation.

Q: What’s bearing?
A: Bearing is the compass direction from your starting point to your destination. 0° = North, 90° = East, 180° = South, 270° = West.

Q: Can I use this offline?
A: Hell yeah. Download the free kit and take it anywhere.

Q: Why use this if I’ve got a chartplotter?
A: Because batteries die. Screens fail. Real sailors have backups.

🚤 Try It Yourself

Test it on our site or download the offline Nautical Route Calculator kit. Share it with your crew, stash it on a USB, or laminate it and throw it in your nav table.

⚓ No registration, no fluff—just pure sailing tools.

🔒 Download & Safety Note

You can download the kit directly from our Drive link or request it by email.
We don’t track. We don’t snoop. Just the calculator, plain and salty.

🌊 Final Bearings

“Real sailors don’t guess. They calculate—then trust the wind.”

If this tool helped you—share it, pass it on, spread the salt.
Got questions, feedback, or a better heading? Hit us up: