Johannes Frederik class
 " Christien " of the Johannes Frederik class
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The Johannes Frederik class is a series of seven RIB lifeboats for sea rescue operated by the Dutch sea rescue company KNRM ( Koninklijke Nederlandse Redding Maatschappij ). RIB is the abbreviation for the English term Rigid Inflatable Boat and thus describes a rigid inflatable boat .
development
In the 1970s, the then Zuid (predecessor of the KNRM) started the development to replace the old harbor lifeboats of the Carlot class (e.g. " Johanna Louisa "). With their heavy steel hulls and two diesel engines of 140 hp each, these boats only reached a speed of 11 knots . It therefore took too long to reach ships at sea in an emergency in a reasonable time. The increased use of fast sport boats and the advancing technology in boat building also made the old ships no longer up to date. With a completely new design , a completely new type of boat should be designed as an all-weather lifeboat . The following requirements were to be implemented:
- high seaworthiness
- good maneuverability
- shallow draft
- high speed
- Self righting
- greatest possible safety for the crew
The model was the prototype of the Medina-Class , which the English sea rescue company RNLI ( Royal National Lifeboat Institution ) had developed from the Atlantic 21 boats from 1980. The Zuid then had a similar boat built with the name “ Koningin Beatrix ” and used it at her station in Noordland-Burghsluis . With the merger of the two organizations Noord and Zuid , the KNRM developed the new Johannes Fredrik class from this prototype. After a stopover in the reserve fleet, the boat transferred to the station in Urk , where it was taken out of service in 2008.
Similar to its predecessor, the Johannes Fredrik class is a rigid inflatable boat (RIB) with an aluminum hull and a closed deck structure. The circumferential rubber bulge makes the RIB boat almost unsinkable and it can also be driven in heavy seas. The rubber bead also serves as a fender to walk alongside at higher speed levels and under difficult conditions in the case of damaged vehicles. In the case of capsizing, it can straighten itself , as the deck structure forms a closed hollow body that always strives upwards through the low-lying engines and the tanks in the bottom. The two diesel engines of 680 hp each drive waterjets , with a maximum speed of 34 knots. The 14.40 meter long ship has a draft of 0.75 meters and is driven by a crew of four . In the event of an emergency, it offers space for 75 people. Shipwrecked people floating in the water can easily be taken on board via a lowerable hatch in the stern. The water jet drive is advantageous here, as it has no moving parts in the water.
The first boat of the Johannes Frederik class was put into service in 1988. By 1997, eight boats of this type were built by Aluboot in Hindeloopen . After the construction of the “ Johannes Frederik ” and the “ Prinses Margriet ”, the boats at the rear end of the wheelhouse were given a raised external control stand, which the Arie-Visser class also has. From 1996 the wheelhouse was adapted to that of the Arie Visser class, which has an offset in the side windows (“ Graaf van Bylandt ”, “ Kapiteins Hazewinkel ”, “ Dorus Rijkers ”). The hull could also be optimized for better handling and larger tanks were installed for greater range.
commitment
Originally, the Johannes Frederik class was also intended to be put to sea from the beach. But the ship turned out to be too long and too heavy, so that it could only be stationed at stations with port infrastructure. As a result, the Valentijn class was developed for this purpose , 11 of which were put into service from 1990 onwards.
The all-weather usability could be proven. The high speed of more than 30 knots holds a good safety reserve against the prevailing wave speeds of around 25 knots even with wind strengths of 10 to 12. This makes it possible to stay in front of the waves at all times and not surf , which would make the boat uncontrollable.
In use, there was a restriction for all-weather use due to the insufficient tank capacity. At “full speed ahead”, deployment times of only 4.5 hours (approx. 150 nautical miles ) could be achieved, which was not considered sufficient for long search missions at sea. As a result, the Arie Visser class was designed to eliminate this disadvantage and to adapt the range to the Dutch SAR surveillance area on the North Sea. With the commissioning of this new class from 1999, the boats of the Johannes Frederik class were replaced at the stations in the North Sea (see column Comments ) and relocated to less exposed stations.
The type ship was the first ship to be decommissioned in 2006 and then sold. The “ Prinses Margriet ” experienced the same in 2010, which was later sold to Belgium . The boat “ Christien ” was a reserve in IJmuiden for a long time and was cannibalized in 2017 and now serves as a museum ship in Stellendam. For example, the engines were built into the " Jan van Engelenburg " due to their shorter running times . The " Dorus Rijkers " is in reserve in Den Helder and is used for overhauls of the Arie Visser boats.
Boats of the Johannes Frederik class
Johannes Fredrik class berths |
| Surname | Callsign | in service | station | comment | |
|---|---|---|---|---|---|
| « Kapiteins Hazewinkel » | PDGT | 2008– | Document | ||
| 2006-2008 | reserve | Berth? | |||
| 1997-2006 | Hook of Holland | replaced by " Jeanine Parqui " | |||
| " Dorus Rijkers " | PDBC | 2006– | reserve | Den Helder berth | |
| 1997-2006 | The hero | replaced by « Joke Dijkstra » | |||
| " Jan en Titia Visser " | PFAF | 1999– | Eemshaven | ||
| 1996-1999 | Schiermonnikoog | replaced by " Koning Willem I " | |||
| " Graaf van Bylandt " | PEJS | 2002– | Vlieland | ||
| 1996-2002 | Burghsluis | replaced by " Koopmannsdank " | |||
| " Jan van Engelenburg " | PFAA | 2008– | Hansweert | ||
| 1999-2008 | Scheveningen | replaced by " Kitty Roosmale Nepveu " | |||
| 1990-1999 | Terschelling | replaced by « Arie Visser » | |||
| off-duty | |||||
| " Christien " | 2017 | Seal Sanctuary Stellendam | |||
| PDKA | 2002-2017 | reserve | Berth IJmuiden | ||
| 1993-2003 | IJmuiden | replaced by " Koos van Messel " | |||
| " Prinses Margriet " | 2010 | sold to VBZR in
Belgium |
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| PGVG | 2000-2009 | Stellendam | replaced by " Antoinette " | ||
| 1990-2000 | Breskens | replaced by « Zeemannhoop » | |||
| « Johannes Frederik » | 2006 | sold | |||
| PFFZ | 1988-2004 | Ameland | replaced by « Anna Margaretha » | ||
| Status @ 2018 - The names of the boats on duty are in bold | |||||
As usual at KNRM, the boats are always on standby according to the KNRM motto: Rescue people - quickly, professionally and free of charge . The crew consists of volunteers who are ready to sail in 15 minutes after being alerted. For the SAR operations, the ships are equipped with the latest devices for communication and navigation / satellite navigation such as B. Radar , NAVTEX , GPS , DGPS , AIS and depth gauges for shallow water. For your own safety, an emergency beacon (EPIRB) and a Search and Rescue Radar Transponder (SART) are on board. There is a firmly anchored tow hook in the stern for assistance, and equipment for first aid is carried along.
In other countries
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Boats of the Johannes Fredrik class are also in use in Poland . From 1997, the MSPiR received seven SAR-1500 ships from the Damen shipyard in Gdynia .
In Belgium in 2010, the voluntary sea rescue service in Blankenberge (Vrijwillige Blankenbergse Zeereddingsdienst VBZR) bought the decommissioned boat “ Prinses Margriet ” from the KNRM . It was renamed " Straffe Hendrik ".
See also
- List of sea rescue units of the KNRM «Ship name»
Web links
Individual evidence
- ↑ Medina class of the RNLI ( English ).
- ^ Johannes Frederik class of the KNRM ( Dutch ).
- ^ Rescue boat Jan en Titia Visser (Dutch).
- ^ Call for repairs to « Straffe Hendrik » (Dutch).
- ^ Lifeboat III " Straffe Hendrik " (Dutch).