A few minutes can decide the next lockage

Catch the same lockage instead of waiting for the next one.

A commercial vessel is heading towards the lock ahead. Rivers & Seas spots the opportunity, compares your arrivals, and shows the calculated matching speed early. You can see whether the next lockage may still be within reach.

Install the free beta See how it works
A recreational boat follows a commercial vessel towards a shared lockage at 10.3 kilometres per hour.

See the opportunity before the gates close

Turn a close arrival into a clear decision.

There is no vessel to find on the map and no arrival time to calculate in your head. Rivers & Seas brings the vessel, lock, and matching speed together.

A suitable vessel ahead

The app identifies a relevant commercial vessel on your waterway towards the next lock.

Arrivals compared automatically

Your ETA and the vessel's ETA are continually related to the same lock.

A useful speed at a glance

You see the speed at which a shared arrival would currently be possible.

No calculations while cruising

“Arrive with Belvedere: 12.1 km/h”

The recommendation appears directly at the next lock, together with distance, estimated arrival, VHF channel, phone number, and important notices. Open the details for a photograph, operating hours, and available dimensions.

Rivers & Seas shows Mühlendamm lock and the speed for arriving with BELVEDERE on iPad.
The map stays large on iPad while the shared-lockage opportunity appears compactly below.
Rivers & Seas shows MUEHLENDAMM OST and 10.3 km/h for a shared arrival at the lock on iPhone.
On iPhone, the vessel, lock, and calculated matching speed appear directly in Waterway Ahead.
Lock details in Rivers & Seas with photograph, VHF channel, phone number, operating hours, and shared arrival.
One tap opens the lock with contact details, operating hours, and other available information.

Even while the device is locked

The opportunity can reach you as a notification.

When Rivers & Seas detects a suitable shared arrival during a background check, a notification can show the required speed. The map does not need to be open. Notifications and Always location access are required on the iPhone or iPad.

When does the recommendation appear?

When vessel, lock, and arrival reliably belong together.

Rivers & Seas needs a sufficiently reliable position and direction, the next lock on your waterway, and recent AIS data for the commercial vessel. It only shows the suggestion when the existing analysis finds a meaningful shared arrival. Lock staff, traffic, and the permitted speed still determine whether you can actually join that lockage.

Explore Waterway Ahead

Questions about reaching a lock together

How can I avoid narrowly missing the next lockage?

Rivers & Seas identifies a suitable commercial vessel ahead, compares your expected arrivals at the next lock, and shows the calculated matching speed. You can decide earlier whether a shared arrival is realistic.

What does a suggested speed such as 10.3 km/h mean?

It is the speed at which the current calculation expects you to reach the next lock at about the same time as the detected commercial vessel. The situation is recalculated when speeds or AIS data change.

Can the shared-lockage suggestion work while the iPhone or iPad is locked?

Yes. On iPhone and iPad with their own location capability, Rivers & Seas can run a background check and show a suitable opportunity as a notification. Notifications must be allowed and location access set to Always.

Do I need my own AIS receiver?

Not necessarily. Rivers & Seas can use available recent internet AIS data. An onboard AIS receiver or Signal K can provide traffic data directly when configured.

Does the suggested speed guarantee that I will join the lockage?

No. It is a calculated arrival aid. Traffic, the permitted speed, radio communication, and the instructions of lock staff remain decisive.

Less waiting, calmer arrivals

Let Rivers & Seas spot the useful moment ahead.

Install Rivers & Seas and see locks, commercial vessels, and possible shared arrivals directly on your waterway.

Install the free beta See how it works