What is inland waterway navigation?

Inland waterway navigation is boating on rivers, canals, lakes and connected harbour systems — not on open sea. In Europe this includes networks such as the Rhine, Main, Danube, Moselle, Meuse, canals of France and the Netherlands, and thousands of connected berths.

Unlike coastal chartplotters that focus on tides, harbours and offshore marks, inland navigation depends on locks, bridges, fairway buoys, speed limits and gauge-dependent depths. A route that works for a 10 m motor cruiser may be impossible for a 15 m boat with 3.5 m air draft because of a fixed bridge or lock chamber size.

Key fact: Europe has more than 37,000 km of navigable inland waterways. Planning tools must follow the mapped fairway — not draw straight lines across land between two harbours.

How do I plan a canal route in Europe?

Start with your boat’s dimensions and your must-see stops. A good inland route planner will snap waypoints to the waterway graph, estimate distance and duration, and surface locks, bridges and harbours along the fairway.

Set your vessel profile — draft (depth below waterline), air draft (mast or cabin height above water), beam and length.
Pick start, end and overnight stops — marinas, town quays or anchorages with enough depth.
Check water levels — low water can close reaches; high water can limit bridge clearance.
Download offline charts — mobile signal is often weak along rural canals.
Confirm with official notices — lock maintenance, bridge strikes and seasonal closures change daily.

Rivanaut automates fairway routing and multi-stop planning on iPhone, iPad and Apple Watch, with optional offline regions for the areas you cruise.

Why does vessel size matter for inland routing?

Locks and bridges are the main constraints on European canals. A navigation app that only knows your GPS position — but not your boat — cannot warn you that the next bridge is 20 cm too low or that a lock chamber is too narrow.

Vessel-aware routing filters or flags segments where published dimensions conflict with your profile. Coverage depends on OpenStreetMap and local data quality; always verify critical clearances yourself.

Draft — minimum depth under the keel
Air draft — height above water (bridges, tunnels)
Beam — width (lock chambers, narrow channels)
Length — overall length (lock length, mooring)

Water levels and official gauges

On inland rivers, depth and bridge clearance change with gauge readings. Rivanaut shows live levels from official sources where integrated:

Germany — PEGELONLINE
Netherlands — Rijkswaterstaat
France — Vigicrues

Check the trend (rising or falling) the day before you move. A route that was fine last week may be blocked after a dry spell or flood.

What is the best app for European canal boat navigation?

For inland rivers and canals, choose an app built for the waterway network — not only for coastal charts. Marine chartplotters like Navionics excel on sea and large lakes but are often weaker on canal fairways, lock metadata and vessel-aware inland routing.

Rivanaut is designed specifically for European inland waterways: vessel-aware routing, inland charts with marks and depths, harbour reviews, water levels, anchor watch, offline regions and a full logbook. It runs on iOS 17+ (iPhone, iPad, Apple Watch).

See our detailed comparison of inland vs marine chart apps or download Rivanaut from the App Store.

Safety and official sources

Rivanaut is a planning and assistance tool, not a certified navigation system. Before every trip, consult official waterway authorities, lock operators and local regulations. Never rely on a single app for bridge clearance or lock availability.

Charts are based on OpenStreetMap community data. Report map errors in-app or via OpenStreetMap so the network improves for everyone.