Home > Maritime services > Hydrographic Information

Vertical clearance as given on the chart.
At bridges over navigable waters are notice boards stating the height of the obstruction in metres. This height is called “vertical clearance” and is calculated in the following way:

The distance between “Mean high water” and the lowest part of the obstruction, within the navigable channel, reduced by a safety margin of 0,5-2,0m depending on expected swell in the area.

Low bridges across sheltered waters
is given as the actual height of the bridge above mean sea level without the safety margin.

Low bridges are those where the clearance can easily be estimated from a small boat i.e. up to approximately 3m in height.

Opening hours and further information:

Bay of Bothnia  
Luleå (414, 4101) Bergnäsbron
Piteå (415, 4151) Pitsundsbron
Sea of Åland  
Väddö canal (536) Älmstabron
Väddö canal (536) Bagghusbron
Northern Baltic  
Western och Eastern Lagnö (612) Klintsundet
Karl Johansslussen (6141)  Slussen Lock CLOSED until May 31, 2021
Hammarbyleden (6141) Merchant vessels  Danviksbroarna, Skansbron, Liljeholmsbron
Hammarbyleden (6141) pleasure vessels Danviksbroarna, Skansbron, Liljeholmsbron
Strömma canal (6143, 6145)


Nynäshamn, Oxnö (6171, 6172) Tottnäsbron
Norrköping (6212)  Händelöbron
Södertälje Kanal  
Södra kanalen (6181) Södra kanalbroarna
Norra kanalen (6181)  Mälarbron, Slussbron, Slussen
Lake Mälaren  
Eastern lake Mälaren (111) Nockebybron
Eastern lake Mälaren (111) Tappströmsbron 
Eastern lake Mälaren (111) Stäket
Uppsala, Fyrisån (112)  Flottsundsbron, Ultunabron, Kungsängsbron
Sigtuna (112) Erikssundsbron 
Strängnäs (111)  Stallarholmsbron 
Strängnäs (111, 113)  Tosteröbron
Hjulstabron (113) Hjulstabron 
Western lake Mälaren (113, 1131)


Western lake Mälaren (114, 1131) Kungsörbroarna
Central baltic  
Västervik/Gamleby (6231) Stegeholms kanal (Stora Strömmen)
Southern baltic  
Karlskrona Hasslöbron Will not open Aug. 19 - Oct. 7.
The Sound  
Falsterbokanalen (921)



Göteborg (9312, 1352)

The bridge signals on bridge "Marieholmsbron" are out of order for southbound traffic. Please contact bridge control on VHF ch 9.

  Hisingsbron New bridge under construction.
Sotekanalen (933)


Lake Vänern and Trollhätte canal  
Göta älv and Trollhätte canal

Trollhätte canal

Nordreälv (931)  Ormo skärmanläggning
Kungälv (1352)  Bohusbron
Säffle (134)  Slussen, Nysätersbron 
Dalslands canal Dalslands kanal
Hjälmaren (114)  Hjälmare kanal
Örebro (114) Skebäcksbron
Göta canal Göta kanal 

Dela artikeln