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Displaying items by tag: Dutch torpedo training ship

#DUTCH NAVAL VISIT – A torpedo training ship HNLMS Mercuur (A 900) is one of four vessels of the Royal Netherlands Navy based in Den Helder which are scheduled to visit Dublin Port next weekend, writes Jehan Ashmore.

During the four-day call, the HNLMS Mercuur and the Alkmaar class minehunter HNLMS Vlaardingen (M 863) will be open to the public on the Saturday and Sunday between 2pm-4pm. All the vessels will be berthed alongside Sir John Rogersons Quay.

HNLMS Mercuur is fitted with a maintenance shed for torpedoes and as a target ship for submarines to fire dummy torpedoes. She has an armament of 1 underwater launch tube for Mk. 48 torpedoes. The 64.8m vessel has a crew of 39 and the vessel which displaces 1,400 tonnes is powered by a 2 x MAN 6L-20/27 diesels (1,632 hp total) which deliver 14 knots.

The 41.5m long navy training ship (MOV) Van Kinsbergen (A902) is used for practical nautical training, a task for which it was specifically built and equipped. In addition to the navigation bridge, the MOV Van Kinsbergen has a second, fully equipped training bridge. There are five-crew and also the same number of civilian crew.

A second Alkmaar class vessel HNLMS Zierikzee (M862) forms the final member of the flotilla. Each of the 51.5m long vessels which weigh 534 tonnes has a crew ranging between 28-38 personnel. The Alkmaar class origin is a joint design of the Netherlands, Belgium and France navies.

The Dutch constructed the propulsion system, the Belgiums provided the electronics and the French built the mine-hunting equipment. To reflect the cooperation between the three countries, the international name of this class of ship, are referred as the Tripartite class.

Published in Naval Visits

The Star keelboat is a 6.9 metres (23 ft) one-design racing keelboat for two people designed by Francis Sweisguth in 1910.

The Star was an Olympic keelboat class from 1932 through to 2012, the last year keelboats appeared at the Summer Olympics at which Ireland's representatives were Peter O'Leary and David Burrows.

Ireland has performed well in the class internationally thanks to some Olympic campaigns including a bronze medal at the Star World Championships in 2000, won by Mark Mansfield and David O'Brien.

The boat is sloop-rigged, with a mainsail larger in proportional size than any other boat of its length. Unlike most modern racing boats, it does not use a spinnaker when sailing downwind. Instead, when running downwind a whisker pole is used to hold the jib out to windward for correct wind flow.

Early Stars were built from wood, but modern boats are of fibreglass and carbon construction.

The boat must weigh at least 671 kg (1,479 lb) with a maximum total sail area of 26.5 m2 (285 sq ft).

The Star class pioneered an unusual circular boom vang track, which allows the vang to effectively hold the boom down even when the boom is turned far outboard on a downwind run.

Another notable aspect of Star sailing is the extreme hiking position adopted by the crew and at times the helmsman, who normally use a harness to help hang low off the windward side of the boat with only their lower legs inside.

At A Glance – Star Specifications

Designer Francis Sweisguth
Year 1910
Crew 2 (Skipper + Crew)
S + 1.5 C ≤ 250 kg (550 lb)[1]
Draft 1.016 m (3 ft 4 in)
Hull Type keelboat
Hull weight ≥ 671 kg (1,479 lb)
(including keel)
LOA 6.922 m (22 ft 9 in)
LWL 4.724 m (15 ft 6 in)
Beam 1.734 m (5 ft 8 in) at deck
1.372 m (4 ft 6 in) at chine
Hull appendages
Keel/board type bulb keel
401.5 ± 7 kg (885 ± 15 lb)
Rig
Rig type sloop
Mast length 9.652 m (31 ft 8 in)
Sails
Mainsail area 20.5 m2 (221 sq ft)
Jib/genoa area  6.0 m2 (65 sq ft)
Upwind sail area ≤ 26.5 m2 (285 sq ft)

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