Mälaren

Mälaren, Sveriges till storleken tredje insjö efter Vänern och Vättern.

Har ett flertal ledfyrar och ensfyrar men saknar f.d. bemannade fyrplatser eller fyrskepp. 
 Sjöns yta utgörs av en mängd fjärdar vikar och sund. Yta 1140 km2 (exklusive öarnas yta), längd 117 km, bredd 0,5-50 km, största djup 64 m. 
 Tillflöden sker genom Arbogaån (med Hjälmare kanal), Kolbäcksån (med Strömsholms kanal), Eskilstunaån, Fyrisån m fl. Mälaren utfaller i Östersjön vid Stockholm via Norrström och Söderström (Slussen). Handelssjöfart genom Södertälje kanal. 

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Fd bemannade fyrplatser

F.d. bemannade fyrplatser har INTE funnits i Mälaren.

Mälaren är utprickad och försedd med fyrar av typen ledfyr, ensfyr och hamnfyr samt kantmarkering av kanaler och farleder.

Några bilder på obemannade fyrar i Mälaren

• 

  Koholmsgrund. Foto Sune Wilhelmsson

• 

  Kurön. Foto Sune Wilhelmsson

• 

  Oknö Hälludde. Foto Sune Wilhelmsson

• 

  Ridö Pilskär. Foto Sune Wilhelmsson

• 

  Stavskallen. Foto Sune Wilhelmsson

• 

  Toppvik. Foto Sune Wilhelmsson

• 

  Torshälla. Foto Sune Wilhelmsson

• 

  Västerås. Foto Sune Wilhelmsson

• 

  Ytterholmen. Foto Sune Wilhelmsson

• 

  Lustig fyr. Foto Sune Wilhelmsson

Fyrskepp

Fyrskepp har INTE funnits i Mälaren.

Kassunfyrar

Kassunfyrar finns INTE (?) i Mälaren.

Radiofyrar

Radiofyrar har INTE funnits i Mälaren.

Kanaler

Sjötrafiken leds huvudsakligen via Södertälje kanal och Hammarbyleden.

Mälaren har anslutning till följande kanaler:

• 1639 invigdes Hjälmare kanal
• 1792 invigdes Strömsholms kanal
• 1819 invigdes Södertälje kanal
• 1929 invigdes Hammarbyleden

Länkar

• Mälaren. Ur Blänket Nr 2016:2 Mälarens ledfyrar, Sune Wilhelmsson

Jfr kanal, Hjälmare kanal, Strömsholms kanal, Södertälje kanal, Hammarbyleden

Jfr Bottenviken, Norra Kvarken, Bottenhavet, Ålands hav, Finska viken, Norra Östersjön, Mellersta Östersjön (med Gotland, Öland, Kalmarsund), Södra Östersjön, Öresund, Kattegatt, Skagerack, Nordsjön, Norska havet, Barents hav, Vänern, Vättern, Mälaren, Hjälmaren, Ladoga,

Jfr svenskt fyrväsende, danskt fyrväsende, finskt fyrväsende, norskt fyrväsende