Using a Chartplotter and Traditional Navigation Together: A Hybrid Approach

Clara SuggettMarch 26, 20266 min read

Chartplotters make navigation fast, but they can fail at the worst time. Paper charts and compass bearings give you a backup you can trust when the screen stops cooperating.

That’s why this post shows how to plan on paper and use your chartplotter to follow the route. You’ll also know how to confirm your position with visual fixes, running fixes, and dead reckoning.

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What You Need Before You Leave the Dock

You don’t need a boat full of gear to do this well. You just need a few reliable tools that work together.

Electronic Essentials

Start with a chartplotter and keep the nautical charts updated. Old charts can be confusing, especially near reefs and shallow areas.

Bring a backup GPS source too. A handheld GPS works great. A tablet with an offline navigation app also works, as long as you prep it.

Don’t forget backup power. Pack charging leads that fit your devices. Bring a power bank that can recharge your phone or tablet more than once.

Traditional Navigation Essentials

Carry paper charts for the area where you’ll sail. Pick large-scale charts with clear details, landmarks, and depth contours.

Bring a hand-bearing compass for taking bearings on landmarks and buoys. It’s small, but it does a lot.

For plotting, bring a parallel ruler or a Portland plotter. You can also use dividers for measuring distances.

Use soft pencils, like 2B or 3B, so marks stay visible and erase cleanly. Keep a watch and a logbook handy, too.

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The 3 Step System That Keeps You On Track

This is the routine that keeps your navigation easy. It also keeps you from chasing the screen all day. Think of it as plan, enter, then verify.

Step 1: Plan on Paper First

Start with the paper chart. Draw your course line from departure to destination. Mark your turning points so the route stays clear.

Next, scan the track for hazards and safe water. Look for shoals, reefs, restricted areas, and shallow contours. Circle anything that demands extra space.

Then mark a safety corridor around your track. Many sailors use half a nautical mile on either side.

Adjust it for the area and conditions. This corridor gives you a buffer when the tide or current nudges you off course.

Step 2: Enter Waypoints Into The Chartplotter

Now take that paper plan and enter the waypoints into the chartplotter. Keep it simple. Use fewer waypoints and place them in safe water.

Check the auto route before you commit to it. Compare it to the hazards you saw on the paper chart. If the route cuts corners near danger, fix it right away.

Step 3: Verify Your Position Regularly

Don’t wait until you feel lost. Verify your position as part of the routine. It takes less time than recovering from doubt.

Take visual bearings when landmarks are visible. Use depth soundings as a second check. Then plot a fix on the paper chart and compare it to the chartplotter position.

If both agree, you’re in a strong spot. If they don’t, slow down and double-check with another fix.

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How to Take a Visual Fix With Compass Bearings and a Paper Chart

A visual fix sounds technical, but it’s simple once you run the steps a few times. Think of it as a quick reality check you can do anytime land is in sight.

Pick two or three landmarks that are fixed and easy to spot. Use charted objects like lighthouses, towers, church spires, and radio masts.
Take a bearing to each landmark with a hand bearing compass. Write down the bearing, the time, and your log reading right away.
Convert each magnetic bearing to true using the chart’s variation. Use the compass rose on the paper chart.
Find each landmark on the chart and draw a line from it. Use your plotter or parallel rulers for accuracy.
Repeat for the other landmarks. Where the lines meet is your position.
Expect a small triangle instead of a perfect point. That’s normal and still useful.

Do this often in familiar waters first. When you need it in tighter conditions, the process will feel automatic.

How to Use a 3-Point Fix to Check the Chartplotter GPS

Sometimes the chartplotter looks fine, but something feels wrong. A three-point fix gives you a quick way to confirm your position with your eyes and your chart.

Run a GPS truth check when you feel off, even if the screen looks normal.
Do it when your depth sounder doesn’t match the charted depth.
Use it in tight passes, near reefs, or in shallow anchorages where errors matter more.
Pick three charted landmarks that are fixed and easy to identify.
Take a compass bearing to each landmark and write down the time.
Convert the bearings from magnetic to true using the chart variation.
Plot a line of position from each landmark on the paper chart.
Look at the triangle where the lines meet. This is your best estimate of position.
Compare that triangle to the chartplotter position.
If the GPS is outside the triangle, trust the plotted fix and reassess your route.

This check takes a few minutes and can prevent a bad call near hazards.

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What To Do When You Only Have One Landmark or Lose Electronics

If you’ve only got one charted landmark, use a running fix.

Take a bearing to the object and plot the line on the paper chart. Record the time and your log reading. Continue sailing and calculate the distance traveled from speed and time.

Take a second bearing to the same object and plot it. Move the first line forward by the distance travelled, keeping it parallel. Where it meets the second line is your position.

If the electronics fail, switch to dead reckoning.

Start from your last confirmed fix on the paper chart. Use your logbook to plot your compass course and the distance travelled.

Mark that estimated spot as your DR position. Keep plotting each hour until you can take a new visual fix.

Train Advanced Navigation Skills With Sailing Virgins

Sailing Virgins builds confident skippers by teaching both electronic navigation and traditional skills side by side.

You’ll learn how to use a chartplotter for fast awareness, then confirm what you see with paper charts, compass bearings, and practical fixes.

This isn’t theory-heavy training. It’s hands-on navigation that prepares you for real conditions. You’ll leave with a repeatable routine you can use on any boat, in any cruising ground.

Want to build navigation skills that hold up offshore, at night, and in tight waters? Train with Sailing Virgins in an ASA advanced course!

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