Clear to dock.

See free berths before you sail in.

Klamp is the digital green/red plate: the owner marks the berth free when sailing out, and you see it on the map before you round the pier.

Get the app Free for iPhone · Coming soon to Android

10.000+harbours on the map

23countries in the EU and EEA

0 kr.for the core — always

EUhosting, no tracking cookies

How it works

Three things. No fee.

Step 1

Flip the plate, digitally

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

Step 2

Find a free berth

Free berths are on the map with a dot and a word. Reported by the sailors themselves, not the harbour office.

Step 3

Scan and moor up

The QR sign on the post shows the berth's status to anyone walking past — no app needed.

See the app

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 Helsingør: harbour pins along the coast, the water depth at the centre of the map, a search field and a list of the nearest harbours with their distance. — The mapHarbours, depth and free berths — on one map.

Screenshot of a harbour page in Klamp: the weather at the harbour, an aerial photo with the berths as green and red marks, and the list of berths marked Free and Taken. — The harbourWeather, VHF channel, facilities and the berths.

Screenshot of My berth set free: green light at the top, the map with the berth as a green square, the choice Free selected and the line with the expected return. — Your berth — freeOne tap, and the guest sees for how long.

Screenshot of My berth set to Taken: red light at the top, the berth as a red dot on the map and the line saying the berth is yours and no guest can take it. — Your berth — takenTurn the cleat, and the berth is yours again.

For you with a berth

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

Turn your cleatFree with one tap, and the guest sees your return time.

Told when someone ties upAnd when they leave again — even 200 miles away.

Message the guestWithout sharing your phone number.

The sign on the postQR code and a print-ready sign for your berth.

For you on passage

Know whether there is a berth at the quay before you are there.

Free berths, liveWith an expected return time, so you know how long the berth holds.

Over 10,000 harbours in 23 countriesFacilities, phone and VHF channel for every harbour.

Filter for what you needFuel, water, power, showers, toilets, a shop.

Watch a harbourTold when a berth frees up where you're heading.

Klamp+

Everything aboard

Your chart sails you there. Klamp tells you about the berth.

Harbour map

Every harbour drawn with piers and berths. Free, taken and unknown shown by shape, colour and word.

Reserve

Ask the owner for the berth before you sail. Nobody can reserve without the owner's yes.

Klamp+

Wind and weather

Wind arrows and strength across the map, from Apple Weather. Every harbour has its own weather.

Anchor watch

Set the radius and sleep. If she drags, the alarm breaks through — even on silent.

Klamp+

Navigation

Cross-track error, speed over ground and a live ETA. Your position never leaves the phone.

Logbook

Your trips are stored in your own iCloud — never with us.

The big ships around you

The ferry route and the cargo ship in the approach draw themselves on the chart with course, speed and the vessel's true size — free, so you can see what is coming and give way in good time. With Klamp+ you also see who and where to: name, destination, estimated arrival and draught. Commercial vessels only, never leisure craft. For orientation, not for navigation. Data via AISHub.

The core is free. Klamp+ is for those who want more along. Marking your own berth free never costs anything.

DKK 39/mo · DKK 249/yr

Klamp is not a nautical chart. Depth shading is indicative — always navigate by a real chart.

The sign on the pier

The sign on the post is the same product as the app.

Every berth gets its own QR code and a print-ready sign. Same mark, same colours, same answer: scan the sign and you see straight away whether the berth is free — no app needed.

See the harbour poster

Free app for sailors

See free berths before you sail in.

Over 10,000 harbours in 23 countries. The core is free — Klamp+ is DKK 39/month or DKK 249/year.

For iPhone · Coming soon to Android · no tracking cookies