Dokkum-class minesweeper: Difference between revisions

Revision as of 12:14, 6 December 2022

Revision as of 14:52, 12 December 2022

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{{Infobox ship characteristics

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| Header caption = <ref name="Amstel74">van Amstel (1991), p. 74.</ref><ref>van Amstel (1991), p. 79.</ref>

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| Ship type = [[Minesweeper]]

| Ship displacement = {{GTcvt|428417|t|LT}}

| Ship length = {{convertcvt|46.62|m|ftin}}

| Ship beam = {{convertcvt|8.7875|m|ftin}}

| Ship height =

| Ship draught =

| Ship draft = {{convertcvt|2.5528|m|ftin}}

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| Ship deck clearance =

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| Ship ice class =

| Ship power =

| Ship propulsion = 2x*2 propellers
*{{cvt|12502500|hp}}
*[[MAN SE|MAN]] V6V22/30 [[diesel engine]]s

| Ship speed = {{convert|14|kn}}

| Ship range =

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| Ship sensors =

| Ship EW =

| Ship armament = * 2x2 x 40mm [[Bofors 40 mm L/60 gun|Bofors]]guns

* 1x1 x 20 mm [[machine gun]] (later added)<ref name="Roetering108">Roetering (1997), p. 108.</ref>

| Ship armour =

| Ship aircraft =

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The '''''Dokkum'' class''' was a [[ship class]] of eightteen [[minesweeper]]s that were built in the Netherlands for the [[Royal Netherlands Navy]].<ref Thename="Amstel7476">van minesweepersAmstel were(1991), basedpp. on74-76.</ref><ref thename="Raven184">Raven [[WU-class(1988), minesweeper]]p. and184.</ref> They were paid for by the United States under the [[Mutual Defense Assistance Act|Mutual Defense Assistance Program]] (MDAP).<ref name="AH27July1955">{{cite news |author=<!--not stated--> |date=10 August 1956|title= Mijnenveger Dokkum was met ‚Wildervank' op bezoek in V.S.|url=https://resolver.kb.nl/resolve?urn=ddd:010614479:mpeg21:p004 |work= [[Leeuwarder Courant]] | language=Dutch|___location= |access-date=}}</ref><ref>{{cite news |author=<!--not stated--> |date=27 July 1955|title= Hr Ms mijnenveger Dokkum in dienst gesteld |url=https://resolver.kb.nl/resolve?urn=KBNRC01:000041292:mpeg21:a0042 |work= [[NRC (newspaper)#Algemeen Handelsblad|Algemeen Handelsblad]] | language=Dutch|___location= |access-date=}}</ref>

== Design ==

The minesweepers of the ''Dokkum''- class were designed by the Dutch engineer Scheltema de Heere and based on the standard requirements laid down by the [[Western Union (alliance)|Western Union]] (WU), later known as [[Western European Union]] (WEU).<ref name="Roetering108" /><ref>Schoonoord (2012), p. 36.</ref> Since the minesweepers of both the ''Dokkum'' and [[Wildervank-class minesweeper|''Wildervank''-class]] are based on WU requirements, they are sometimes referred to in Dutch as ''WU''-class minesweepers or minesweepers of the Western Union type.<ref name="Schoonoord58">Schoonoord (2012), p. 58.</ref>

The ships of the ''Dokkum''-class were made mostly from wood, only the frame and superstructure was made from aluminium.<ref name="LC13October1954">{{cite news |author=<!--not stated--> |date=13 October 1954|title= De mijnenveger „Dokkum" niet zonder moeite te water gelaten: Nu zal het Dokkumer Diep ook uitgediept moeten worden, meent de burgemeester |url=https://resolver.kb.nl/resolve?urn=ddd:010613921:mpeg21:p007 |work= Leeuwarder Courant | language=Dutch|___location= |access-date=}}</ref> It also had a double hull, with the inner hull made out of [[mahogany]] and the outer hull of [[teak]].<ref name="LC13October1954" /> Furthermore, they were equipped with reversible propellers.<ref>{{cite news |author=<!--not stated--> |date=13 October 1954|title= Mijnenveger „Dokkum" gaat met tegenzin te water: Eerste van een klasse van 32 schepen |url=https://resolver.kb.nl/resolve?urn=MMNHA03:179255011:mpeg21:a00146 |work= Nieuwe Haarlemsche Courant | language=Dutch|___location= |access-date=}}</ref>

While the minesweepers of the ''Dokkum'' and ''Wildervank''-class are almost identical, they do differ when it comes to the engines. The ''Dokkum''-class was equipped with two [[MAN SE|MAN]] diesel engines and the ''Wildervank''-class with two [[Werkspoor]] engines.<ref name="Roetering108" /> As a result the minesweepers of the ''Dokkum''-class were more durable than those of the ''Wildervank''-class.<ref name="Schoonoord58" />

When it came to sweeping mines the ships of the ''Dokkum''-class were equipped with several different sweepers. As mechanic sweeper it had the ''Wire Mk 3 mod 2'', the magnetic sweeper consisted of the ''ML Mk 4'' and later the ''Mb 5'', and the acoustic sweepers consisted of the ''AX Mk 4v'', ''AXx Mk 6B'' and ''AX Mk 3''.<ref name="Roetering108" /> Furthermore, the ships were equipped with two 40 mm guns.<ref name="Amstel74" />

=== Conversion to minehunter ===

To keep in line with NATO requirements it was decided in 1962 to rebuild four ''Dokkum''-class minesweepers (''Dokkum'', ''Drunen'', ''Staphorst'' and ''Veere'') into [[minehunter]]s.<ref name="Woudstra154">Woudstra (1982), p. 154.</ref><ref>Schoonoord (2012), pp. 127-128.</ref> During the rebuilding the ships were equipped with a ''Plessey 193'' minehunting system, the bridge was modified to better suit mine hunting operations, a automatic track and trace system and autopilot were installed and several other modifications were implemented.<ref>Roetering (1997), p. 109.</ref> The four minehunters of the ''Dokkum''-class entered service of the Royal Netherlands Navy between 1968 and 1969.<ref name="Woudstra154" />

== Ships in class ==

The ships were named after the smaller Dutch municipalities.<ref>Woudstra (1982), p. 153.</ref>

{| class="wikitable"

|+ ''Dokkum''-class construction data<ref name="Amstel7476" /><ref>van Amstel (1991), pp. 82-83.</ref><ref name="Raven184" />

|-

! Hull number

Line 269 ⟶ 286:

* ² = later rebuild as [[diving support vessel]]

==References Export ==

In 1994 the ''Abcoude'' was sold for 450.000 [[Dutch guilder]]s to [[Peru]].<ref>{{cite news |author=<!--not stated--> |date=8 July 1994|title= Peru koopt Nederlandse mijnenveger 'Abcoude' |url=https://resolver.kb.nl/resolve?urn=ddd:010628990:mpeg21:a0052 |work= [[Nederlands Dagblad]] | language=Dutch|___location= |access-date=}}</ref> In addition, the reserve parts of the ship were sold for 160.000 Dutch guilders.<ref>{{cite news |author=<!--not stated--> |date=8 July 1994|title= Nederlandse mijnenveger aan Peru verkocht |url=https://resolver.kb.nl/resolve?urn=ddd:010644197:mpeg21:a0072 |work= [[Amigoe]] | language=Dutch|___location= |access-date=}}</ref>

==Notes==

===Citations===

{{reflist}}

==References==

*{{cite book |last=Schoonoord |first=D.C.L. |date=2012 |title=Pugno pro patria: de Koninklijke Marine tijdens de Koude Oorlog |language=Dutch|edition= |url= |___location=Franeker |publisher=Van Wijnen |page= |isbn=978-90-5194-455-6}}

*{{cite book |last=van Amstel |first=W.H.E. |date=1991 |title=De schepen van de Koninklijke Marine vanaf 1945 |language=Dutch|edition= |url= |___location=Alkmaar |publisher=De Alk |page= |isbn=90-6013-997-6}}

*{{cite book |editor-last=Raven |editor-first=G.J.A. |date=1988 |title=De kroon op het anker: 175 jaar Koninklijke Marine |language=Dutch|edition= |url= |___location=Amsterdam |publisher=De Bataafsche Leeuw |page= |isbn=90-6707-200-1}}

*{{cite book |editor-last=Roetering |editor-first=B. |date=1997 |title=Mijnendienst 1907-1997 90 jaar: feiten, verhalen en anekdotes uit het negentigjarig bestaan van de Mijnendienst van de Koninklijke Marine |language=Dutch|edition= |url= |___location= |publisher=|page= |isbn=90-90-10528-X}}

*{{cite book |last=Woudstra |first=F.G.A. |date=1982 |title=Onze Koninklijke Marine |language=Dutch|edition= |url= |___location=Alkmaar |publisher=De Alk |page= |isbn=90-6013-915-1}}

{{Post1945DutchShips}}