Royal Australian Navy Discussions and Updates

Status
Not open for further replies.

ThePuss

Defense Professional
Verified Defense Pro
How often do you see NBC etc getting USS and USNS mixed up... :)
Um ... I don't know mate, but I can imagine :)..... My favorite name for a USNS Barge is the USNS Tippecanoe. When we pulled alongside her for a RAS-L I nearly shat myself laughing :p
 

StevoJH

The Bunker Group
The ABC's 7.30 has confirmed corrosion on the ship was so serious that parts of the hull were only two millimetres thick.
Whats the normal hull plate thickness for a steel hulled warship/commercial ship?

Just wondering since I know a conventional small alluminium craft is ~3-5mm. But thats just something the size of this or this which being aluminium can get away with a thinner hull and are hardly comparable in size anyway.

And on that note, how hard is it to strip off hull plates at the various parts of framing below them (with a grinder?) and weld on new plating? I would have thought it fairly straight forward or does that part of the hull need special bracing while the plating is removed?
 

harryriedl

Active Member
Verified Defense Pro
Rumor has it they rejected it because they wanted a local build.. The argies haven't exactly be flash with the cash, so the real reason may be a bit of a mystery. The french have the mistrals now so I can see why they don't have to hold onto it. But we would be buying an older ship.
From what I remember it was to with the asbestos in the hull and it would cost too much and take too much time to make it compliant so they rejected it.
 

StingrayOZ

Super Moderator
Staff member
Well I would have thought the french would have been off abestos by then. However it is around the period when it was being phased out.

The argies were offered it, rejected it, no one else seemed interested. Where as there seems a lot of interest in a Largs..
 

swerve

Super Moderator
Well I would have thought the french would have been off abestos by then.
You're right, they were. Harry is probably confused by the earlier aborted sale of the older Orage-class French LPDs to Argentina, which fell through because they were (like many other 1960s warships) full of the stuff.

That was before it was decided to retire Foudre early & put her up for sale.

The french have the mistrals now so I can see why they don't have to hold onto it.
The French set on four amphibs as the desired fleet size, with the first two Mistrals replacing Orage & Ouragan. Now Dixmude is building, Foudre will soon be spare, though there is an argument that one ship could replace the training role of Jeanne d'Arc now she's retired.

That big dock has its uses, & I expect some of the MN would like to keep Foudre, but I think the real driver for flogging her is budgetary. Dixmude was ordered earlier than she needed to be tp keep shipyards busy, & now some of the cost has to be saved. I wonder what'll happen to Siroco. Kept on, replaced by a fourth LHD & sold, or sold off without replacement?
 

StingrayOZ

Super Moderator
Staff member
Seems the French and the Spanish (and british) yards have simular problem in that they aren't getting quiet enough work through (although the goverments haven't been perfect in allowing that to happen either). This translates into is your ship building industry sustainable or not.

So both the French and the Spanish Im sure would be keen to please, and provide a few reasonable options if we were interested. Given both have pretty good supply, LHD's etc, they might concider moving one of the not so old ships to us and building a new one for themselves.

So in terms of aquisition we aren't up poo creek just yet, I would imagine that IOC within the RAN would be simular from any three of the nations offering solutions for us.

We are up poo creek in terms of capability right now. With ships that could be opened with a butterknife (and thats the good one!) and are essentially inoperaterable. Really all of this should have been happening while the LHD bid was getting up back in 07(?) Then we would have this capabilty right not and not have to scab off NZ, who lets be honest, doesn't really have much for us to scab. Not only that when we lobby for them to take a more active role we are going to be shakey ground given we are infact leaning on them for capability we should have 24/7 ourselves and is proberly more important than the F-111 capability gap.
 

StevoJH

The Bunker Group
A little change of topic. But what ship is the current flagship of the RAN Fleet? I assume normally it would be Kanimbla or Manoora, but with those two both out of action, which ship is it?
 

Pusser01

The Bunker Group
Verified Defense Pro
She's in a multi-year refit though, she's officially still the flagship though?
She's flagship in name only, she doesn't carry a command staff or anything. She's only in charge of task groups if her CO is the senior one in company.
 

StevoJH

The Bunker Group
She's flagship in name only, she doesn't carry a command staff or anything. She's only in charge of task groups if her CO is the senior one in company.
Thought so, which makes it a bit weird in my mind. Considering the flagship of a fleet or task group is generally the command ship of that formation.
 

gf0012-aust

Grumpy Old Man
Staff member
Verified Defense Pro
considering that the fatships will be taking turns as floating versions of HQJOC, then they will be flags when they deploy

more to the point, where the senior rank sits is where the flag sits. as they're floating purple ........
 

alexsa

Super Moderator
Staff member
Verified Defense Pro
Whats the normal hull plate thickness for a steel hulled warship/commercial ship?

Just wondering since I know a conventional small alluminium craft is ~3-5mm. But thats just something the size of this or this which being aluminium can get away with a thinner hull and are hardly comparable in size anyway.

And on that note, how hard is it to strip off hull plates at the various parts of framing below them (with a grinder?) and weld on new plating? I would have thought it fairly straight forward or does that part of the hull need special bracing while the plating is removed?
Thickness depends on the steel in use. HT will be thinner that mild steel. For mild steel commercial vessel 12mm is pretty standard. I suspect the amphibs are mild steel but am willing to be corrected.

The other issue is the degradateion my be pitting combined with wastage. As such the whole plate is not down to 2mm (it woule have failed if that was the case) rather the pitting will reduce thickness in a dimpled effect (ugly dimples).

The repair depends on the scope of the damage and where there is wides spread damage the entire plate may need to be renewed, however, standard (commercial rules) require a 300mm overlap over frames to spread stress rather than simply croping the rotten area. Doublers (as have been used) are only a short term solution and can lead to further degredation of mprimary structure.
 

Kirkzzy

New Member
Hey, just wanted to know. What would be the difference in availability (like percentage and how many ships we will have up all the time) between 3 or 4 AWDs.
 

StevoJH

The Bunker Group
Hey, just wanted to know. What would be the difference in availability (like percentage and how many ships we will have up all the time) between 3 or 4 AWDs.
With 3 ships 1 should be available all the time and 2 some of the time.
With 4 ships 1 should be available all the time and 2 most of the time.
 
Status
Not open for further replies.
Top