Why Is Marine Electronics So Expensive? A Skipper Explains

A good tablet costs a few hundred euros. A navigation display of a similar size for a yacht can cost several times more. Guests ask me about it all the time: isn't it just a screen? It isn't. On a modern yacht, that display is the control centre of the whole boat, and it has to keep working in conditions that would kill a phone in a week.

It's not a screen. It's the brain of the boat

The display at the helm is called a multifunction display, or MFD. On its own it does little. Its job is to pull data from sensors all over the boat, usually through a standard marine network called NMEA 2000, and show it in one place.

System	What it tells the captain
GPS and chartplotter	Where the boat is and where the dangers are on the chart
Radar	Other boats, coastline and rain, even at night or in fog
AIS	Name, course and speed of nearby ships, and whether you're on a collision course
Depth sounder	How much water is under the keel
Autopilot	Steers a course so the crew can watch, trim and rest
Wind instruments	True and apparent wind speed and direction
Engine data	Temperature, oil pressure, fuel, alarms

The captain doesn't look at seven separate gauges. He sees one picture and makes decisions in real time.

Seeing the rain before you see it

One of my favourite things about radar is weather. Rain shows up on the screen as patches of echo, often before you can see the squall from the deck. At night, that's the difference between a calm reef in the sail and a surprise.

Built for a place that destroys electronics

A phone lives in your pocket. A yacht display lives in sun, salt spray and vibration, 24 hours a day, for years. So it's built differently:

• Sealed housings. Most helm displays are waterproof to IPX6 or IPX7, which means spray or even brief submersion.
• Waterproof connectors. Every cable entry is a place for salt water to get in, so connectors are sealed and locking.
• Protected circuit boards. Boards get a thin protective coating against moisture and salt.
• Corrosion-resistant parts. Metals and fasteners are chosen to survive salt air.
• Sunlight-readable screens. Much brighter than a tablet, so you can read a chart at noon in July.
• Wide temperature range. From a cold night passage to a black screen baking in the sun.

The same goes for the cables themselves. Wherever a cable passes through the deck or the hull, for an antenna or an instrument, it needs a proper sealed fitting, or water will find its way along it.

Tested like ship equipment

Navigation equipment for ships is tested to an international standard called IEC 60945. It covers extreme temperatures, humidity, solar heating, corrosive salt atmosphere, vibration, water and dust ingress, and electromagnetic interference. Equipment required on large ships under international safety rules must meet it, and many leisure manufacturers test to similar levels.

All that testing, plus small production numbers compared with phones, means the development cost is shared by far fewer buyers. That alone pushes the price up.

Superyachts: where the price really climbs

On a superyacht, electronics are not one display. They're an integrated bridge: several large screens, two or more radars, satellite communications, cameras, alarm systems and links to the engine room.

And almost everything is doubled. Backup units, backup networks and backup power supplies, so the yacht can still navigate if one system fails. On the largest yachts, the navigation and electronics package can run into millions of euros.

When you're responsible for a yacht worth tens of millions and the people on board, failure is not an option.

Can you just use a tablet?

For a backup, yes, and many skippers do. A tablet with good charts is a great second opinion. But as your main navigation it has real limits:

• It overheats in direct sun and can shut down.
• Most tablets aren't truly waterproof.
• It has no direct link to radar, AIS or the autopilot.
• Batteries run out exactly when you need them most.

The smart setup is a proper helm display as the main system, and a tablet or phone as a backup, mounted securely where you can see it.

Captain's checklist for boat electronics

1. Cover helm displays when not in use. Sun is their worst enemy.
2. Check connectors and cable entries at the start of the season for green corrosion or leaks.
3. Keep charts and software updated before the season, not at sea.
4. Always carry a backup: tablet, phone with charts, and paper charts for the area.
5. Know how to steer and navigate if everything goes dark.

Captain's note

When guests see the price of a helm display, they think they're paying for a screen. They're really paying for the thing that tells the captain where the rocks, ships and storms are, and keeps doing it when everything around it is wet, hot and shaking.

See you on the water,
Captain Phil

Source: TÜV SÜD, IEC 60945 testing.