L.E. James Joyce P62

[Herald]

with regard to cleaning up exhaust emissions from marine engines, I worked on marine turbines in 1996 and 1997 that had exhaust gas recirculation systems in active use then, which were designed to reduce NoX emissions. The engines were going into fast ferries being built for Hong Kong.So, cleaning exhausts isn't new or untried.

I think its the Visby Corvettes that have a system where the exhaust fumes are run horizontally to the stern where they're mixed with salt water and released at, or just slightly above the waterline. I don't think they're bothered so much by environmental issues, rather with keeping the heat signature as low as possible.
It's all part of the Visby's stealth characteristics.

[Laners]

Most of Brittany Ferries vessels including the Pont Aven have been fitted with scrubbers to to comply with the new regulations governing exhaust emissions .

[hptmurphy]

Going back to the 40mm Bofor proposal. They are too slow for the job in that under power, with step motors, they would track in jerks. You would have to redesign to have smooth , stabilised tracking systems. You must also ensure that any power mount has a feed from the emergency Gennie system, otherwise with loss of ship's power it's back to buckets and spades, and the 20mm plus 12.5's and GPMG's.

Rate of fire is far below the optimal and the sighting systems were basic to say the least

[na grohmiti]

I think the 40s most recently fitted to the PVs had barrels stamped 1956. The gun wasn't designed to be accurate, just put lots of big lead in the air for an enemy aircraft to fly into. The fact that most navies have replaced them in service with remote 25mm/30mm cannon says it all.

[hptmurphy]

I think the 40s most recently fitted to the PVs had barrels stamped 1956. The gun wasn't designed to be accurate, just put lots of big lead in the air for an enemy aircraft to fly into. The fact that most navies have replaced them in service with remote 25mm/30mm cannon says it all.

The last batch were 40/70s as opposed to the 40/60s originally fitted. God only knows the origins and actual ages given the 40/60s only came on stream with the sweepers,almost 50 years after being designed.

[ancientmariner]

The 40/70 was developed in answer to the advent of Jet aircraft. Heavier powered mount, lighter shell, higher mv, and more than double the RPM at up to 330rpm. They can be fire controlled and are still fitted in some field vehicles. The 40/60 in use by 1934 and the 40/70 late 1940's.

[jack nastyface]

Realistically, saving anything bar an attack from something of Fouga vintage, crew served weapons would be largely ineffective.
At this stage in the Navy's development, and presuming that any of the ships face a realistic threat from the air, it would make sense to be evaluating either RWS like the the typhoon or Konigsberg, or small missile anti air systems like Mistral, integrated with Radar and FCS.
Failing that, adapting RBS 70 manpads might provide some form of interim solution.

Ah,sure it'll be grand....Irish solution to an Irish problem..

[hptmurphy]

But as is being overlooked the 40mm was fitted to the PVs as the primary armament in a Fishery Protection capacity, modelled on the role it had with the RN in its minor warfare fleet. The threat potential faced nowadays is so far removed from that envisaged on concept of that fleet.

The Fleet as it stands primarily engages in Fishery Protection and Drug interdiction, policing type roles where the weapons fit doesn't need to exceed what it is.

However if we are to engage in operations in more hostile environments, it will need to be revisited.

[Turkey]

Just a note concerning a couple of removed posts:referring to the class 60's as "The dead poets society" is about the limit of my usually easy going tolerences.

[GoneToTheCanner]

Hah! LOL!

[Lordinajamjar]

Just a note concerning a couple of removed posts:referring to the class 60's as "The dead poets society" is about the limit of my usually easy going tolerences.

Yes dead right Turkey otherwise they have to be reclassified as DP60s.

[jack nastyface]

Just a note concerning a couple of removed posts:referring to the class 60's as "The dead poets society" is about the limit of my usually easy going tolerences.

Do hope they don't go for an LE Brendan Behan. It will be too pissed to get down the slip, irascible and never do what's required of it...

[25 pounder]

She's/He's to be comissioned next tuesday 01/09/2015 in Dun Laoirge. Enda Kenny to attend.

[Galloglass]

She's/He's to be comissioned next tuesday 01/09/2015 in Dun Laoirge. Enda Kenny to attend.

Glad to hear that as there are some saying on the web that her engine troubles had "returned".

[Rhodes]

LÉ James Joyce sets sail

A new naval vessel has been commissioned and named after renowned Irish writer James Joyce, at a ceremony at Carlisle Pier, in Dún Laoghaire, Dublin.

LÉ James Joyce is the newest of the eight ships of naval service. It will be assigned to offshore patrols, and has special capabilities to deploy mini submarines used for underwater searches.

A number of James Joyce's family members were at the ceremony, and the ship's captain Lieutenant Commander Brian Dempsey was presented with a special edition copy of Ulysses, 1 of just 100.

James Joyce's grandniece Carol Joyce led the traditional ceremony of breaking a bottle of champagne on the ship's hull, accompanied by Taoiseach Enda Kenny and Minister Simon Coveney.

http://www.rte.ie/news/2015/0901/724864-news-in-brief/