Klamp — the digital green/red plate

You come home to an empty berth. And you can message whoever was in it.

Klamp isn't only something you do for the guest. It's your berth, your homecoming and your peace of mind — with a direct line to the sailor who tied up at your place.

Empty when you say soYou set your return — “tomorrow at four” — and the guest knows exactly when the berth has to be free again.

Message the guestWrite to whoever is in your berth — “we're running late”, “the key to the power point hangs in the shed”. Without sharing your phone number.

Told the second someone ties upAnd when they leave again. You always know what's happening at your post — even 200 miles away.

And when you're out yourselfAnchor watch at night, man overboard with one tap, wind and ships on the map, friends you can see and message.

This is what it looks like when you sail.

Screenshots from the app, not mock-ups. Swipe through them — or get it and see for yourself.

Screenshot of Klamp's map near Snekkersten: wind arrows across the water, ships with course and speed, harbour pins and a search field at the bottom. — **The map**Wind, ships and free berths — live.

Screenshot of the harbour page for Snekkersten: weather, VHF channel, facilities and the list of berths with their status. — **The harbour**Weather, VHF channel, facilities and the berths.

Screenshot of My berth set to FREE: the berth is green with the expected return time, and the dimensions below. — **Your berth — free**One tap, and the guest sees for how long.

Screenshot of My berth set to HOME: the berth is red and belongs to its owner again. — **Your berth — home**Turn the cleat, and the berth is yours again.

Three things. No booking, no fee.

Flip the klamp

One tap as you cast off. Say when you're back — so the guest knows exactly how long the berth holds.

A guest finds it

Free berths glow green on the map. No booking, no fee — you moor on trust, the way sailors always have.

The sign ties it together

A QR code on the pile shows the status to anyone walking past. Scan it, and you see straight away whether the berth is free.

Your chart sails you there. Klamp tells you about the berth — and everything around it.

The harbours and your own berth are free, forever. Klamp+ is for those who want more along.

The berth

Turn your cleat
Green with one tap — and say when you're home.
Free berths, live
Reported by the sailors themselves. Not the harbour office.
10,536 harbours in 23 countries
Facilities, phone and VHF — filter on what you need.
Messages
Write to the guest in your berth — and to your friends.
The sign on the post
QR code and a print-ready A6 sign. Works without the app.
Watch a harbourKlamp+
Told when a berth frees up where you're headed.

At sea

Charts with depths
Seamarks and EMODnet depths on top of the map.
Bearing and navigationKlamp+
Cross-track error, speed over ground and a live ETA — like a plotter.
AIS — the big ships
Course, speed and true size. Free, from our own aerial.
Weather and windKlamp+
Wind arrows across the map, from Apple Weather.
Ohøj — see your friends
Follow their boat when they switch it on. And message them.

Depth shading is indicative and built on open data. Navigate by your chart — Klamp is not a chart, and says so itself.

When it matters

Anchor watch
Set the radius and sleep. If she drags, you're woken.
The alarm breaks through
Even on silent and in Do Not Disturb. Approved by Apple.
Man overboard
One tap: position, course back — and the ships around you with call signs.
On the lock screen
Distance and radius all night — without opening the app.

Set it free with peace of mind — and come home to an empty berth.

Nordic marinas sit half empty most of the summer while visiting sailors motor past looking for space. Not because there's no room — but because nobody can see which berths are free. That's the problem Klamp solves.

You say when you're back, and you're told the second a guest moors. Marking your own berth free never costs anything, and never will — Klamp+ is for those who want more: watch a harbour, see who's coming, plan further ahead.

Free · Coming soon to Android

The app

Harbours

Help

Your berth sits empty
while you're out sailing.

You come home to an empty berth. And you can message whoever was in it.

This is what it looks like when you sail.