Tåge og dårlig sigt på vandet: hvad gør du?

Senest kontrolleret: 14. oktober 2026

Trin for trin

1. Bestem din position nu

   Når du ser tågen komme, så notér straks din position på GPS'en og på dit papirsøkort.[13]

2. Sænk farten

   Langsomt er den eneste sikre fart i tåge. Sejl med en fart, der lader dig stoppe eller dreje i tide, og hav motoren klar til at manøvrere med det samme.[27][6]

3. Lanterner tændt, reflektor oppe

   Tænd dine lanterner, også om dagen, og sørg for, at din radarreflektor er sat op.[11][23][14]

4. Giv dit tågesignal

   Efter COLREGs giver en motorbåd, der gør fart gennem vandet, én lang tone (4–6 sekunder) mindst hvert 2. minut; en sejlbåd giver én lang og to korte toner. En båd under 12 m kan i stedet give et andet effektivt lydsignal mindst hvert 2. minut.[1][2][3][10]

5. Se og lyt

   Sæt ekstra besætning på udkig, og tjek, at alle har redningsvest på. Sluk musikken, og bliv ved med at lytte efter motorer, horn, stemmer og tågesignaler.[8][15][18][22]

6. Brug radar og AIS, men stol ikke på dem

   Brug radar og AIS, hvis du har dem. Husk, at små både måske ikke kan ses på andre skibes radar, selv med reflektor.[14][19][28]

7. Hører du et signal forude? Sænk til krybefart

   Hører du et andet fartøjs tågesignal forude, så sænk farten til det mindste, der holder dig på kurs, og stop, hvis det er nødvendigt, til faren er drevet over.[7]

8. Kom væk fra skibsruterne

   Med sikker fart og fast kurs: Sæt kurs mod lavere vand væk fra travle skibsruter, ankr så, og vent. Skal du krydse en trafikbane, så kryds vinkelret på trafikretningen.[16][9]

9. Giv signal til ankers, og lyt på kanal 16

   Til ankers ringer et fartøj hurtigt med klokken i omkring 5 sekunder mindst hvert minut; en båd under 12 m kan i stedet give et andet effektivt lydsignal mindst hvert 2. minut. Bliv ved med at lytte på VHF kanal 16.[5][3][20]

10. Tilkald hjælp, hvis du er i fare

    Tror du, at du sidder fast et farligt sted, så brug din VHF-radio til at tilkalde hjælp.[17]

Undgå

• Hold ikke din normale fart. Langsomt er den eneste sikre fart i tåge.[27]
• Gå ikke ud fra, at skibe kan se dig på radar eller AIS.[19][28]
• Spil ikke radio, og lad dig ikke distrahere af samtaler; du har brug for dine ører.[22]
• Kryds ikke en skibsrute på skrå; skal du krydse, så gør det vinkelret.[9]
• Gå ikke ud fra, at solen brænder tågen væk; havgus kan holde sig langt ind på eftermiddagen.[21]

Før du sejler

• Før du sejler: Montér den bedste radarreflektor, der er praktisk på din båd.[29]
• Før du sejler: Hav et fungerende lydsignalmiddel med. Både under 12 m skal ikke have fløjte og klokke, men skal have et andet middel til at give et effektivt lydsignal.[12]
• Før du sejler: Lær de horn- og klokkesignaler, du skal give i tåge.[26]
• Før du sejler: Hav kompas og søkort med, så du stadig kan navigere, hvis elektronikken svigter.[25]

Ofte stillede spørgsmål

Kilder

Kilderne citeres på deres originalsprog.

1. IMO COLREGs Rule 35(a), text published by US Coast Guard Navigation Center (2026-10-14): “A power-driven vessel making way through the water shall sound at intervals of not more than 2 minutes one prolonged blast”
2. IMO COLREGs Rule 35(c), text published by US Coast Guard Navigation Center (2026-10-14): “shall, instead of the signals prescribed in Rule 35 (a) or (b), sound at intervals of not more than 2 minutes three blasts in succession, namely one prolonged followed by two short blasts”
3. IMO COLREGs Rule 35(j), text published by US Coast Guard Navigation Center (2026-10-14): “A vessel of less than 12 meters in length shall not be obliged to give the above mentioned signals but, if she does not, shall make some other efficient sound signal at intervals of not more than 2 minutes.”
4. IMO COLREGs Rule 35(b), text published by US Coast Guard Navigation Center (2026-10-14): “A power-driven vessel underway but stopped and making no way through the water shall sound at intervals of no more than 2 minutes two prolonged blasts in succession with an interval of about 2 seconds between them.”
5. IMO COLREGs Rule 35(g), text published by US Coast Guard Navigation Center (2026-10-14): “A vessel at anchor shall at intervals of not more than 1 minute ring the bell rapidly for about 5 seconds.”
6. IMO COLREGs Rule 19(b), text published by US Coast Guard Navigation Center (2026-10-14): “Every vessel shall proceed at a safe speed adapted to the prevailing circumstances and conditions of restricted visibility. A power-driven vessel shall have her engines ready for immediate maneuver.”
7. IMO COLREGs Rule 19(e), text published by US Coast Guard Navigation Center (2026-10-14): “every vessel which hears apparently forward of her beam the fog signal of another vessel, or which cannot avoid a close-quarters situation with another vessel forward of her beam, shall reduce her speed to be the minimum at which she can be kept on her course.”
8. IMO COLREGs Rule 5, text published by US Coast Guard Navigation Center (2026-10-14): “Every vessel shall at all times maintain a proper look-out by sight and hearing as well as by all available means appropriate in the prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision.”
9. IMO COLREGs Rule 10(c), text published by US Coast Guard Navigation Center (2026-10-14): “A vessel, shall so far as practicable, avoid crossing traffic lanes but if obliged to do so shall cross on a heading as nearly as practicable at right angles to the general direction of traffic flow.”
10. IMO COLREGs Rule 32(c), text published by US Coast Guard Navigation Center (2026-10-14): “The term "prolonged blast" means a blast of from four to six seconds duration.”
11. IMO COLREGs Rule 20(c), text published by US Coast Guard Navigation Center (2026-10-14): “The lights prescribed by these Rules shall, if carried, also be exhibited from sunrise to sunset in restricted visibility”
12. IMO COLREGs Rule 33(b), text published by US Coast Guard Navigation Center (2026-10-14): “A vessel of less than 12 meters in length shall not be obliged to carry the sound signaling appliances prescribed in Rule 33 (a) but if she does not, she shall be provided with some other means of making an efficient signal.”
13. RNLI (2026-10-14): “When you see fog approaching, immediately do a position fix on your GPS and on your paper chart.”
14. RNLI (2026-10-14): “Make yourself visible and help yourself see other vessels – switch on navigation lights, make sure your radar reflector’s up, and use your radar and AIS (Automatic Identification System).”
15. RNLI (2026-10-14): “Nominate extra crew for lookout duty and check all are wearing lifejackets.”
16. RNLI (2026-10-14): “At a safe speed and a steady course, head for shallower water where you won’t be in any busy shipping lanes. There, drop anchor and sit it out.”
17. RNLI (2026-10-14): “If you’re really worried you’re stuck in a dangerous place, use your VHF radio to call for help.”
18. RNLI (2026-10-14): “keep listening out for engine noise, horns, voices and other signs of vessels nearby.”
19. RNLI (2026-10-14): “Very small vessels like dinghies don’t always show up on the radar, so you’ve got to be extra careful.”
20. RNLI (2026-10-14): “Listen on VHF Ch 16 and, in restricted waters, Ch 13.”
21. RNLI (2026-10-14): “It’s a common misconception that fog always gets ‘burned off’ by the sun as the day progresses; sea fog can still linger well into the afternoon.”
22. RNLI (2026-10-14): “Don’t be tempted to stick on the radio while you’re waiting for the fog to clear, or get distracted by conversation”
23. US National Weather Service (NOAA) (2026-10-14): “Turn on all of your running lights, even in daytime.”
24. US National Weather Service (NOAA) (2026-10-14): “If you are unable to get your bearings, stay put until the fog lifts but make sure you are in a safe location.”
25. US National Weather Service (NOAA) (2026-10-14): “Have a compass available. Even if you don't know where you are in the fog, with a compass you can determine the direction you are navigating.”
26. US National Weather Service (NOAA) (2026-10-14): “Be familiar with horn and bell sounds you should produce to warn others around you when in dense fog.”
27. Transport Canada – Safe Boating Guide (TP 511E) (2026-10-14): “Slow is the only safe speed in fog, mist, rain, smoke and darkness”
28. Maritime and Coastguard Agency (MGN 349) (2026-10-14): “There is no guarantee that a small vessel will consistently show on radar screens”
29. Maritime and Coastguard Agency (MGN 349) (2026-10-14): “All small craft should consider fitting, where practicable, the most effective and appropriate radar reflector or radar target enhancer (RTE) for their circumstances; and ensure those comply with international standards.”
30. IMO COLREGs Rule 32(b), text published by US Coast Guard Navigation Center (2026-10-14): “The term "short blast" means a blast of about one seconds duration.”

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