Depending on the area, you should always expect to cross bridges on a boat trip. You can find out what you should look out for on drawbridges in our article.

The basic rule is that as the boat driver or person responsible for course and speed, you must always follow the instructions of the bridge supervisor.

When approaching a moving bridge, the boat must slow down. If it is desired to open the bridges, two long tones must be emitted as a signal. As long as no clearance for passage has been given, a distance of at least 50 meters from the bridge must be maintained (unless another distance is specified). If no passage is desired, the boat must be moored on the bank in front of sign B.5.

Furthermore, when approaching a movable bridge, overtaking is prohibited without special permission.

Sign B.5

If the bridge is equipped with signal lights, the following regulations apply:

  • Two red lights on top of each other = no passage (bridge closed)
  • Three red lights next to each other = no passage (bridge closed and temporarily not open)
  • Two red lights next to each other = no passage (bridge closed, or oncoming traffic)
  • One red light = no passage (bridge is in motion)
  • Two green lights next to each other = passage permitted (bridge open)

With an additional white light above the other signal lights, a watercraft may also pass through the closed bridge, taking into account the height and oncoming traffic.

The light signals are only ever visible in the direction of passage.


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