Sailing Conditions for High Speed Vessels By Per Chr. Stubban Fosen Trafikklag
Fosen Trafikklag operates in the coastal areas of mid-Norway • An integrated transport company • 15 Municipals • 340 Employees • 80 Buses • 11 Ferries • 6 High speed vessels • 2 Work shops • 4 Regional offices
In this presentation the sea transport will be highlighted, and in particular the conditions related to high speed vessels. However, some of the evaluations will also be valid for other types of sea transport, like ferries.
Fosen Trafikklag operates 6 High Speed vessels in some of the areas with the most severe weather conditions in the world. Our goal is to arrange for a transport which gives maximum SAFETY, RELIABILITY and COMFORT.
Last February Fosen Trafikklag experienced an accident where a window on one of our high speed vessels were broken from an unexpected wave in one of the areas identifyed as a ”dangerous” area. Dangerous Areas
Then, what can Fosen Trafikklag do? • Firstly, Fosen Trafikklag must provide safe, reliable and comfortable transport. • Secondly, the sailing regulations give restrictions for operations related to the weather conditions (the speed should be adjusted in accordance with the wave hight). • Thirdly, Fosen Trafikklag as a serious operator must ensure that it operates within the given restrictions. • Then Fosen Trafikklag is looking for means of support which can help meeting the requirements, ie. tools which can help making decissions related to the transport. • Which means that we in this context are looking for reliable weather forecasts, information about sailing conditions (waves, wind, currents..) and support to evaluate the comfort level.
Environmental conditions are important for operating high speed vessels • How to get this information available for those in charge?
DNMI, the Norwegian Met. Office, provides weather forecasts for the Norwegian coast, including a special Maritime forecast for the Stad area. • På denne siden planlegger vi å legge varsler utarbeidet gratis for brukere i maritim sektor. Foreløpig har vi lagt ut bølgevarsel for Stad. • Varsel for Stad • Bølgevarselet inneholder diagram som angir vindhastighet og bølgehøyde, vindobservasjoner fra Ytterøyane, Kråkenes og Svinøy fyr, bølgevarsel og refraksjonsdiagram. Bølgevarsling for Stad er spesiell tjeneste DNMI driver på oppdrag fra Kystverket. Nærmere informasjon om tjenesten finner du på Maritime tjenester.
- An example of the special Stad forecast which can be retrieved from the Internet.
As Fosen Trafikklag is situated in Mid-Norway and knowing that the forecast not necessarily will become the reality – This is not enough for us! We are therefore looking for what can be done additionally.
In Spain, the Harbour Authorities (Puerto del Estado) is operating a weather forecast and real time data system for improved safety and increased regularity. The buoy system is delivered by the Norwegian company - OCEANOR
Examples of output from this system, which among others show that forecasts (line) may differ from observations (squares).
In Greece, a similar system as the system in Spain is running, the POSEIDON system The buoy system is delivered by the Norwegian company - OCEANOR
Examples of system output – Meteorological and Wave observations
Principal layout of suggested system for the Fosen Trafikklag operating area Vessels Measurements of ship motions and the evaluations by the captain Measuring stations Presentation of decision parameters Database/Central Other information, forecasts etc
Suggestions for real time data buoy locations in the area operated by Fosen Trafikklag Dangerous Areas Buoy Positions Meteoro- logical Data
Then maybe in a short time our high speed vessels can get this kind of information underway, supporting the decisions to be taken, ensuring SAFETY, RELIABILITY and COMFORT