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MOD: It might be no harm to split the PTI/PTO bits away from the rescue thread
Various public sources (which could be wrong) claim that the P60 class has the following installed
1) Two main Wartsila 16V26 diesel engines, each capable of producing 5440kW. They are each connected via a clutch to its
associated gearbox.
2) Two 350kW PTI/PTO motors, one connected to each gearbox. They can be operated as a Power Take-Off (PTO) where they act as
generators to provide electrical power for the ship, or as a Power Take-In where they act as motors to help drive the
propellors.
3) Three separate 630kW diesel powered alternators and a 320kW emergency generator.
The large main engines are capable of producing 5440kW each but at loiter speeds (<8kts) where only a fraction of this power is
required, it is not efficient to run the main engines. Instead, the main engines are de-clutched from the gearbox. The
propellors are turned by the 350kW PTI motors using electrical power generated by the alternator sets.
When cruising, using either one or both main engines, there is no need to run the alternator sets as the electrical power for
the ship is taken from the PTO.
For maximum speed electrical power from the alternator sets is supplied to the PTI motors to add to the mechanical power from
the main engines to deliver the maximum power to the propellors.
Slides taken from hereSi Vis Pacem, Para Bellum
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#LÉNIAMH rescued a total of 358 Migrants 110 KM North West of Libya today #DefendProtectSupport pic.twitter.com/TB4u9AcTQK
— Irish Defence Forces (@defenceforces) July 24, 2015
More fantastic work being done.For now, everything hangs on implementation of the CoDF report.
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#LÉNIAMH rescued a total of 358 Migrants 110 KM North West of Libya today #DefendProtectSupport pic.twitter.com/TB4u9AcTQK
— Irish Defence Forces (@defenceforces) July 24, 2015
More fantastic work being done.
The rescue efforts are commendable. I've noticed Niamh's photo album is limited and kept tight in background views. You see just one boat and a few refugees. One photograph shows an interesting piece of high pressure pipework, at the ship's side, that could do with some maintenance. It needs de-rusting and recoating.Last edited by Turkey; 25 July 2015, 18:38.
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Originally posted by ancientmariner View PostThe rescue efforts are commendable. I've noticed Niamh's photo album is limited and kept tight in background views. You see just one boat and a few refugees...
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L.É. Niamh takes on a further 110 migrants
Updated about an hour ago
LÉ NIAMH, with 358 rescued persons already onboard, was tasked last night to rendezvous with 2 Italian Coastguard vessels approx 16km South of Lampedusa Island in order to receive a further 110 rescued persons. The transfer was accomplished in calm weather conditions at midnight last night. LÉ NIAMH, with 468 rescued persons onboard , is due into the Sicilian port of Pozzallo at approx 0900 hrs this morning.For now, everything hangs on implementation of the CoDF report.
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468 is a lot of people on Niamhs deck space, its interesting, as another poster said, how close in the most recent photos are, its pretty hard to figure out where they're putting them all, no expansive shots of the aft deck like on Eithne.
I also noticed a temporary awning which seems to be desert camo netting covering a space, but its hard to know where exactly it is.
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02 deck, where the hospitality tent is usually erected. They are out of the way of normal duties and easily observed and controlled, with only one stairway access to lower decks and no direct access to internal areas. The P50s have quite a lot of deck space compared to other vessels, but it isn't obvious.
For now, everything hangs on implementation of the CoDF report.
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Passenger capacity
Originally posted by na grohmití View PostPhotos on Facebook showing the shelter in use. Camo net strung from the Jackstay to the main armament. Again on 02 deck as described above, and also same aft of the funnel. Great ingenuity from whoever thought of it.
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Stability
Originally posted by whirlywindI do not know the stability criteria or fuel tanks disposition or arrangement of the Niamh. Will it ever be the case that the extra top weight cannot be accommodated because of fuel burn off from the double bottoms reduces stability to a dangerous degree?
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Close supervision of those on deck also assists in maintaining stability. I notice in photos the groups seem to be placed quite definitely in rows along the deck, rather than haphazardly in bunches to accumulate where they choose.
I had forgotten how much about stability I had chosen to forget. I would suggest that by design the CofG in the P50 class is quite low. They are wide beam, machinery is for the most part below the waterline, and the three decks above the waterline are mostly empty spaces. Even the steel in use is less thick than that usually seen. While the funnel looks bulky it is mostly ducting. Even the mainmast is skeletal.For now, everything hangs on implementation of the CoDF report.
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The Irish Maritime Forum has raised the matter of what medal can be issued to the crews of Eithne and Niamh for the great work they have done in the Med.
The number of migrants rescued by the Irish Naval Service has passed the 4,000 mark after LÉ Niamh crew rescued 358 people from a wooden barge.
See the end of the article.
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Meanwhile, the Irish Martime Forum, an independent organisation which promotes the country’s maritime resources, has called on the Government to recognise the efforts of the crews of both ships by awarding them medals for the humanitarian mission.
Its spokesman, Captain James Robinson, said a mechanism exists for awarding medals to members of the Defence Forces who perform peacekeeping duties overseas. He said his organisation was urging the Government to create of an appropriate medal to recognise the sterling service of the naval personnel.
after 24 hours, the L.É. AISLING had recovered 38 victims from shark infested waters and four of the Ship’s Company,Lt Cdr James Robinson
On 18 February 1964 a medal to be known as “An Bonn SeirbhÁse Dearscna” or, in English, “The Distinguished Service Medal”, was introduced by the Defence Forces. The medal may be awarded to officers, non-commissioned officers and privates of the Defence Forces and to members of the Army Nursing and Chaplaincy Services in recognition of individual or associated acts of bravery, courage, leadership, resource or devotion to duty (other than any such acts or duty performed on war service) arising out of, or associated with, service in the Defence Forces and not meriting the award of An Bonn MÁleata Calmachta.
I would call rescuing the equivalent to a third of the population of Cobh as being deserving
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There is definitely some need, in my opinion for some form of unit citation. Over the years the NS has carried out many fantastic jobs where the effort of the entire crew led to the successful result, but only certain people would be decorated, where all would have deserved the medal. Paint the medal ribbon colour on the side of the bridge wing, or on the funnel (As was the case with one of the Peacock mascots wearing a DSM).
For now, everything hangs on implementation of the CoDF report.
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