Slipways

Anyone taking a boat to the water should know before setting off where it can go in and whether the water level is right. Slipways is meant to become the reliable map of slipways and marinas in Europe, kept up by the people who use it.

Features

Map and lists

See at a glance what the area has to offer.

Slipways, marinas, waters and engine services on one map.
The list always shows what lies within the map section.

Water levels

Know whether there is enough water for the ramp before you set off.

New readings every 15 minutes from PEGELONLINE.
For the Netherlands from Rijkswaterstaat.

Waterways

See where you can go from where you launch.

Rivers, canals and lakes from OpenStreetMap.

Europe

Find the nearest slipway on holiday too.

Slipways and marinas from OpenStreetMap for twelve countries, from Norway to Spain and Croatia.
Details from the marinas' own websites add to the data.

Contributions without an account

Anyone who has been there can share what they know without signing up.

Add details, tick off facilities, leave tips and suggest missing slipways.
Nothing goes online before it is approved.
A proof of work protects against abuse, without cookies and without third-party services.

Apps for Android and iOS

The map where you need it, at the water.

The same content and features as on the web.

Roadmap

What comes next. A plan, not a promise.

Now

Check the details taken from the marinas' websites
Names for slipways that have none in OpenStreetMap

Photos of slipways and marinas
The map loads only the visible section, then more countries such as Great Britain, Finland, Portugal and Greece
Localisation: web and apps in more languages

Later

Water levels for more countries
A calmer map style (not decided yet)

58 %

Water level

As of 30 October 2026 · Europe on the map, user contributions online

Done

Slipways and marinas from OpenStreetMap for Germany, Austria, Switzerland, the Netherlands, Belgium, France, Spain, Italy, Croatia, Denmark, Sweden and Norway
Water levels every 15 minutes from PEGELONLINE and Rijkswaterstaat
Waterways from OpenStreetMap
Suggestions and corrections without an account, with moderation and a proof of work instead of a captcha
Apps for Android and iOS with the same features
Monitoring with Grafana

In progress

Check the yield of details taken from the marinas' websites
Names for slipways that have none in OpenStreetMap

Planned

Photos of slipways and marinas
The map loads only the visible section, then more countries such as Great Britain, Finland, Portugal and Greece
Water levels for more countries
A calmer map style (not decided yet)

Technology

A backend with ASP.NET Core Minimal APIs (.NET 10), EF Core and SQLite; the web with React 19, Vite, TanStack Query and Leaflet, served with titles and structured data for search engines. The Android app is written in Kotlin with Jetpack Compose, the iOS app in SwiftUI with MapKit. Runs in Docker.