Five electric bidirectional ferries with advanced wind measuring solution
The indicator must change from forward to aft presentation when the ferry changes sailing direction and to meet this requirement, DEIF designed a customized wind measuring system, featuring both true and relative wind.
Advanced wind measuring system
The five new electric ferries are bidirectional, meaning that they are designed to sail in both directions. The navigation light and starboard and port side shifts side when the sailing direction changes and as the ferries have two bows, the indicator must change from forward to aft presentation when the ferry changes sailing direction.
To meet this requirement, DEIF designed a customized wind measuring system comprising two XDi 144 N displays and a WSS 550 wind sensor. The displays are mounted in the panel on each of the two bridges and show both relative (apparent) wind speed and direction but also true wind. One screen view with a forward-looking presentation of wind data and the other view showing the aft-looking wind data. The screens are automatically switched when the ferry shifts sailing direction. Besides the two indicators, the solution comprises a WSS 550—a static sensor with built-in heating to stand even very low temperatures.
M/F Suløy is transporting passengers on the crossing between Hareid and Sulesund in Norway and is one of the five ferries that have the solution installed. So far, Captain Mindor Lidvar Myrhol is positive about the system provided
“I have sailed with the solution since December 2018, when we took delivery of the sister ship, and it is the best wind sensor I have ever used for ferry transport. It is very robust, and the illuminated display is a great help when sailing at night”
Mindor Lidvar Myrhol
Bidirectional sailing can be a bit of a challenge. Before having the new wind indicator system installed, the ferry operator experienced some challenges when operating in slave and master mode with, e.g. the radar. Having a system that features both the true and relative wind indicator makes operation easier.
However, sailing in an area where the weather conditions can be harsh and changeable makes the crew very dependent on having accurate wind data. Especially when calling into port, the crew faces challenges with stream and hard wind from the fells.
“Some days, it looks as if the wind is hitting the wharf, but the wind sensor which is mounted in 20 meters height indicates that the wind actually is coming from the quay. At first, I thought that the sensor was not working correctly, but after some time, we have concluded that these measurements are correct”, Mindor states.
The gusts from the fells have a significant impact on maneuvering the ferry when calling the port as the wind direction at water level and at the top of the ferry can be very different. Having the measurements from the wind sensor provides Mindor and the crew with more valid wind data on which they can maneuver the ferry in the most optimum way.