Dokkum-class minesweeper: Difference between revisions

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* {{navy|Peru}}

| Class before =

| Class after = [[Tripartite-class minehunter{{sclass|''Alkmaar'']]|minehunter|4}}

| Subclasses = {{sclass|Wildervank|minesweeper|5}}

| Cost =

| Built range = 1953-19571953–1957

| In commission range = 1955 - 19991955–1999

| Total ships building =

| Total ships planned = 18

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{{Infobox ship characteristics

| Hide header =

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

| Header caption =

| 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}}

| Ship decks =

| 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 =

Line 61 ⟶ 63:

| 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 eighteen [[minesweeper]]s that were built in the Netherlands for the [[Royal Netherlands Navy]] (RNLN).<ref name="Amstel7476">van Amstel (1991), pp. 74–76.</ref><ref name="Raven184">Raven (1988), p. 184.</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> The ships of the ''Dokkum'' class were the last dedicated minesweepers that served in the RNLN.<ref>{{cite magazine |last=Henkelman |first=K.F.J. |date=February 2010 |title=Het project Herintroductie Mijnenvegen |url=https://marineblad.nl/images/Marineblad/2010-2019/2010/Marineblad%201%20februari%202010.pdf|magazine=Marineblad |volume=120 |issue=1 |pages=22-26|language=Dutch}}</ref>

The '''''Dokkum'' class''' was a [[ship class]] of eightteen [[minesweeper]]s that were built in the Netherlands for the [[Royal Netherlands Navy]]. The minesweepers were based on the [[WU-class minesweeper]] and paid for by the United States under the [[Mutual Defense Assistance Act|Mutual Defense Assistance Program]] (MDAP).

== 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 {{sclass|Wildervank|minesweeper|4}} 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, an 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 233 ⟶ 250:

| 19 December 1956

| 1999

| In use by [[:nl:Zeekadetkorps|Zeekadetkorps]] [[Harlingen, Netherlands|Harlingen]]

| <ref name=Sittard_1>{{Cite web|url=https://onzemarinevloot.weebly.com/hrms-sittard-m-830.html|title=Hr.Ms. Sittard. ex-MSC 186. (Dokkum-klasse)|publisher=Onze Marine Vloot|access-date=5 December 2022|language=nl}}</ref>

|-

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}}