Dreg I-class hydrographic survey vessel

The Dreg I class[lower-alpha 1] was a ship class of four hydrographic survey vessels that were built in the Netherlands for the Royal Netherlands Navy (RNN).[2] They served in the RNN between 1950 and 1986.[3]

Dreg IV
Class overview
NameDreg I class
BuildersDe Groot & Van Vliet, Slikkerveer
Operators Royal Netherlands Navy
Built1949–1950
In service1950–1986
Planned4
Completed4
General characteristics [1]
TypeHydrographic survey vessel
Displacement48 t (47 long tons)
Length20 m (65 ft 7 in)
Beam4.40 m (14 ft 5 in)
Draft1.40 metres (4 ft 7 in)
Propulsion
Speed10 knots (19 km/h; 12 mph)
Crew4

Design and construction

The hydrographic survey vessels of the Dreg I class were all built at the shipyard of De Groot & Van Vliet in Slikkerveer.[2]

For surveying the vessels were equipped with echo sounders and marker buoys that were shaped as spheres.[4]

Service history

In November 1950 two vessels of the Dreg I class were transported from the Netherlands to Dutch New Guinea by ship.[5] In total three survey vessels of the Dreg I class (Dreg I, Dreg II and Dreg III) served in Dutch New Guinea till 1 October 1962.[3]

In 1963 the Dreg I-class hydrographic survey vessels were active in the North Sea to collect data that would help determine the safest waterway to the Europoort.[6]

In 1966 three Dreg I-class survey vessels were used to map a part of the IJsselmeer between Staveren and Lemmer.[4]

In 1970 three hydrographic survey vessels of the Dreg I class were sold.[7][8]

Ships in class
Dreg I-class construction data[3]
Ship Pennant No. Laid down Launched Commissioned Decommissioned Fate
Dreg I A909 15 May 1950 17 July 1950 6 April 1970 Sold to C. Houkoop on 6 October 1970.
Dreg II A910 15 May 1950 17 July 1950 6 April 1970 Sold to P. Peetoom on 6 October 1970. Later rebuild as yacht.[9]
Dreg III A919 14 December 1949 21 August 1950 18 September 1950 6 April 1970 Sold to C.P. Vader on 6 October 1970. Later taken over by the shipping company Waterweg.
Dreg IV A920 14 December 1949 21 August 1950 25 September 1950 Gifted to Stichting Onderwaterschatten Zeeland on 23 March 1987.

Notes
  1. The class was also known in Dutch as Dregboten.[lower-alpha 2]

Citations
  1. van Amstel (1991), p. 90.
  2. Raven (1988), p. 190.
  3. van Amstel (1991), pp. 90-91.
  4. "Dregboten Hydrografie in actie op IJsselmeer: Gedeelte langs Friese kust wordt gepeild". Leeuwarder Courant (in Dutch). 4 July 1966.
  5. "Zeeschepen per schip naar hun bestemming". Het Parool (in Dutch). 4 November 1950.
  6. "Marine wil diep in de Noordzee tasten: Voor veilige vaart naar Europoort". Algemeen Dagblad (in Dutch). 30 October 1962.
  7. "Verkoop bij inschrijving". De Volkskrant (in Dutch). 10 September 1970.
  8. "Verkoop bij inschrijving". De Telegraaf (in Dutch). 10 September 1970.
  9. "Schrijver Tom Rot zoekt liefhebbers van schepen met een verleden: 'Libertijn' vaart op liefde". Algemeen Dagblad (in Dutch). 30 March 1974.

References
  • Raven, G.J.A., ed. (1988). De kroon op het anker: 175 jaar Koninklijke Marine (in Dutch). Amsterdam: De Bataafsche Leeuw. ISBN 90-6707-200-1.
  • van Amstel, W.H.E. (1991). De schepen van de Koninklijke Marine vanaf 1945 (in Dutch). Alkmaar: De Alk. ISBN 90-6013-997-6.
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