EPV for naval service

[315]

EPV contenders?

I was thinking along the lines of a Absalon class

[DeV]

The RFP Specs:

Appendix B Con/195/2006
Statement of Requirement EPV
Naval Service Patrol vessels are required to undertake a range of duties including, fishery protection, search and rescue, maritime protection, drug interdiction, anti-pollution and maritime security duties, including vessel boarding. The EPV will be required to provide an extended patrol capability capable of undertaking these duties throughout Ireland’s EEZ and in the adverse weather conditions of the North Atlantic. The following is an outline of the characteristics required to fulfil that role. The vessels must be designed and constructed to the Rules and Regulations of the International Association of Classification Societies (IACS).

Length 130 – 140M
Beam 16-20 m
Draft 4.0- 5.0 m

Max Speed 22-26 Kts Cruise Speed 15 Kts Loiter Speed 0 – 8 Kts

Range 8,500 nm Endurance 24 days

Propulsion Diesel, Diesel Electric, DE Hybrid,
Power Generation Diesel Generators, Shaft Alternator, PTO/PTI

Communications HF, VHF, UHF, GMDSS, SAT
Radars Navigation and Air Defence
Stabilisation Active and Passive

Flight Deck 1 Spot for a 10 metric tonne helicopter

Medical LEVEL 11, for 2 pers.

Accommodation Crew + 12 trainees.

Options
Proposals should be provided for the following additional options
1.Helicopter in-flight Refuelling Facility
2.Provision of Dynamic Positioning class 2 or 3
3.Because of the required size of the vessel, there may be potential to increase the utility of the vessel in other roles which would be desirable but not essential.* In this regard, the potential to provide a level of carrying capability for personnel, military vehicles and containers within the size and configuration of the vessel to which the mandatory requirements give rise, should be set out in the proposals.
In this regard, the proposal should indicate the possible arrangements/ combinations of personnel, vehicles and containers that could be accommodated and should indicate the lane metres that can be designed into the vessel.* Annex A indicates the type of items which might be carried on the vessel although not necessarily at the same time.* Proposals should include separately the option of a facility for cargo discharge where no port infrastructure exists.* The implications of including such carrying capacity and cargo discharge arrangements on the nature of the proposed vessel should be fully outlined in the proposal. As already stated above, these optional additional capabilities are desirable but are not essential requirements of the proposed patrol vessel.

6.2. of the RFP states that the assessment of proposals will be based on “Vessels being (or being based on) an existing proven product.”


GFE will consist of main and secondary armaments and certain military communications equipment. This will be fully addressed in Stage Two of the procurement process.

No organic helicopter will be embarked, however the aft deck should be strengthened to permit the capability of landing a 10 metric tonne helicopter. Recovery and launch requires no ship based equipment or facilities.

It is intended that the vessel will undertake a range of duties including, fishery protection, search and rescue, maritime protection, drug interdiction, anti-pollution and maritime security duties, including vessel boarding - 90% of which will relate to fishery protection. On limited occasions it may be used to carry personnel, military vehicles and equipment.

A Level II medical facility is capable of resuscitating and stabilising seriously ill/injured patients and maintaining them for at least 24 hours.

The Naval Service stability criteria applied to the OPV will be,
International Convention on Load Lines 1966 and Amendments 1971 and 1975,

SOLAS 1974 as modified by Protocol 1978 and subsequent IMO amendments of 1981 and 1983,

Vessel to be capable of withstanding two compartment damage in accordance with SOLAS 90,

IMO Resolution A 562, Recommendation of Severe Wind and Rolling Criterion for Intact Stability.

The seakeeping criteria required is,
Unrestricted operations of all equipment in sea state 5.

The ability to continue all assigned tasks with some reduction in performance in sea state 6.

The Vessel to be capable of surviving in sea state 9 and wind force 12.

The stabilisation systems must have a theoretical roll reduction greater than 90%.

[FMP]

Cheers for that DeV.

Sounds like the issues being addressed verbally on that other thread are in fact being addressed in reality in this proposal. Sounds exactly like what we have been suggesting.

No organic helicopter will be embarked, however the aft deck should be strengthened to permit the capability of landing a 10 metric tonne helicopter. Recovery and launch requires no ship based equipment or facilities.

Fingers crossed and with luck (though luck is not a factor) there will be enough money in the pot for it and maybe another it.

Good man and thanks.

[Galloglass]

The Absalon is a bit big perhaps? By the way there is a thread that's been going for years on this Forum re EPVs.....Have you seen it yet? Welcome to the machine.

[FMP]

The Absalon is a bit big perhaps? By the way there is a thread that's been going for years on this Forum re EPVs.....Have you seen it yet? Welcome to the machine.

Gallowglass. Did you mean me or 315?

I'm on about the current River Class thread. It has morphed into a helideck no helideck navy needs navy doesn't need etc. etc. Worth a visit also.

Think you should have posted the above there DeV, liven things up a bit though it is rather lively as it is .

[DeV]

EPV threads merged

Discussions about EPVs here (that meet the specs!)

[DeV]

What's currently out there (these designs could of course be modified and used as a basis):

Absalon - draft too deep
Canterbury - beam & draft too big, too slow, range not long enough (and crap)

[na grohmiti]

Main constraint is the entrance to the basin has a sill at about 5m below datum and is quite narrow. Tidal range is between 3 and 5m. Any contender must be able to squeeze in this gap. (Top left corner). Another criteria that is important is the nearby drydock, the only one in the state where all routine out of water work is done, has a maximum beam accepted of 21m.



For scale, Eithne, seen moored in the basin, has a beam of 12m.

[hptmurphy]

And before anyone even thinks about it the basin in Haulbowline cannot be made any deeper as it is concrete based!!!!!

[hptmurphy]

I'm on about the current River Class thread. It has morphed into a helideck no helideck navy needs navy doesn't need etc.

The discussion is

Why the Navy doesn't currently have a heli deck

Why the P61s will not have heli decks

Why the ability was not retained on the P31

NOT that a future purpose designed ERP would have the capability.

Please don't resort to trolling

[Jetjock]

Look its fantastic that in the current economic climate that the NS managed to make the case for 3 new OPVs. That in itself is a win. However given that the only improvements are related to seakeeping abilities and ships accommodation, one is left wondering at what might have been. On the other hand, given the economic armageddon of the last 6 years, three new ships at all despite their limitations are a miracle. To all the sea dogs out there..what defines your perfect ship for the NS?

[DeV]

I've spend a fair bit of the day checking the requirements against whats out there...... no off the shelf design that I can find (unless your talking nice big expensive large crew frigates).

[na grohmiti]

The improvements on the new OPVs are far more wide ranging than what you suggest.
However:

A perfect ship, from what I hear from navy people would be as follows.
1. Grey.
2. A ship.
3. Armed with something more than a 40mm AA gun.
4. Lean manning, Long Range, fuel efficient, able to remain at sea in the worst an Atlantic winter can throw at you.

This is the minimum criteria. After that you want details.
1. Long Range, all weather boarding boats.
2. Best Navigation radar available.
3. Best Surface search radar available.
4. Best Air search radar available.
5. Enough space for the various kit that has become part and parcel of some of the other tasks the NS get involved in. That includes 20 foot containers, vehicles, maybe even a helimachopper.
6. The best EOS available.

and finally

7. the quantity of the above not to be less than 2.

[ibenji]

[QUOTE=na grohmití;420855]Main constraint is the entrance to the basin has a sill at about 5m below datum and is quite narrow. Tidal range is between 3 and 5m. Any contender must be able to squeeze in this gap. (Top left corner). Another criteria that is important is the nearby drydock, the only one in the state where all routine out of water work is done, has a maximum beam accepted of 21m.



For scale, Eithne, seen moored in the basin, has a beam of 12m.[/Q

Any ship to be purchased in the future will have to fit in the old dry dock for repairs.

[DeV]

You'll note in the spec that the EPV has to be within certain dims