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Tjärven Stockholm route
 

WIND, VISIBILITY AND DARKNESS RESTRICTIONS FOR FURUSUNDROUTE

GENERAL

These guidelines apply to vessels piloted by Maritime Administration pilots.

Note that individual pilots may, for nautical safety considerations, decide to further strengthen these requirements.

The Maritime Administration may impose specific restrictions governing the arrival of a vessel.

WIND RESTRICTIONS

For piloted vessels with a length over 300 m

Separate decision for each vessel.

For piloted vessels with a length of 245-300 m

In mean wind speeds between 12-15 m/s, the Maritime Administration will make an assessment of the relevant vessel's possibilities to navigate the fairway.  This assessment is based on whether the vessel is familiar with the pilot area from earlier, the wind direction, whether it is day or night, and other factors affecting the vessel's performance. The evaluation will be made as early as possible, but since factors can change quickly, decisions may be made during piloting.

The maritime Administration will not commence piloting assignments in mean wind speeds exceeding 15 m/s.

Passage of Furusund in darkness - maximum allowed sustained wind speed is 10 m/s. ViVa-station Ålandsgrundet.

For piloted vessels with a length of 175-245 m

In mean wind speeds between 15-18 m/s, the Maritime Administration will make an assessment of the relevant vessel's possibilities to navigate the fairway.  This assessment is based on whether the vessel is familiar with the pilot area from earlier, the wind direction, whether it is day or night, and other factors affecting the vessel's performance. The evaluation will be made as early as possible, but since factors can change quickly, decisions may be made during piloting.

The maritime Administration will not commence piloting assignments in mean wind speeds exceeding 18m/s.

Passage of Furusund in darkness - maximum allowed sustained wind speed is 12 m/s. ViVa-station Ålandsgrundet.

For piloted vessels up to 175 m
Normally, no restrictions.Wind strength is assessed according to the Maritime Administration's wind-gauge on Remmargrund. The wind-gauges on Ålandgrund and Lagnögrund and SMHI's BizMet wind forecast are also considered in the assessment.


VISIBILITY RESTRICTIONS

Reduced visibility = < 500 m

For piloted vessels with a length over 300 m.
Separate decision for each vessel.

For piloted vessels with a length of 175-300m

If the reduced visibility affects the greater part of the route Tjärven-Stockholm and is expected to persist, no piloting will be commenced.

When reduced visibility is partially present/expected/occurs, the pilot will assess whether piloting can commence/continue.

For piloted vessels up to 175 m Normally, no restrictions.

DARKNESS RESTRICTIONS
For piloted vessels with a length over 300 m. 
Separate decision for each vessel.

For piloted vessels with a length of 175-300m, and Naval ships with a length over 125 m.

For vessels exceeding 175 m in length, it must be daylight from Gryten on entry to Stockholm and to Gryten on departure from Stockholm according to the Maritime Administration's times for darkness restrictions.

Vessels between 175-255 m can be granted exemptions from this darkness restriction based on an evaluation and may also be subject to additional restrictions. Exemption is given for Tjärven only and always with 2 pilots and wind restriction of 12 m/s for vessels > 200 m(15 m/s for vessels < 200 m).

Applications must be submitted to the Stockholm pilot area in advance, though at least 10 working days prior to the relevant date.

For piloted vessels with a length of up to 175 m

Normally, no restrictions.

Updated: 2019-02-19