Norwegian Navy

[designeraccd]

Physics will not be denied........ DFO

[ivorthediver]

I'm sure the Skipper will never forget that now Dennis eh

Dennis ....as an aside questions to be answered by you on the general modelling thread please

[Little h]

NavyLookout @NavyLookout on Twitter
4 minutes ago

Another sad image from Norway.
#HelgeIngstad

Dr0hD11WsAA933x.jpg

[designeraccd]

Wires broke during the night....... DFO

[Little h]

Wires broke during the night....... DFO

and/or

NavyLookout @NavyLookout on Twitter

Securing wires were unable to prevent #HelgeIngstad sliding into deeper water. Last night she sank further and is now almost entirely submerged.

(image deleted because it was a duplicate of the 2nd image in the previous post )

________________________________

So was it 'the wires broke' or 'the securing wires were unable to prevent'??

Based on the wires being unable to prevent - this latest development leaves me pondering a few questions .

Has any forum member seen an image that:-
- gives a lead as to the method used for attaching these 'securing' wires to the ship?
- shows any of these 'securing' wires wrapping round or over the semi-submerged ship hull?
- shows whether these 'securing' wires could be slipped in the event of the semi-submerged ship re-settling further in the water? - the fixed end of the shore-side wires can be seen looped over/around steel 'bollards' in the rock and would need the power tool to unscrew the nuts on the U-bolts.

Would it be right to presume that if the wires haven't snapped or been slipped when she re-settled then there must be a chance that a) the ship has suffered further damage at the point where the wires were secured, or b) if the wires were wrapped over/around the hull then these wires may have been sliced into the hull. In either case that would mean more holes to plug.

[ivorthediver]

Interesting point Harry

I would have thought with a vessel of this value they would have welded plates adjacent to main structural formers / bulkheads that could take such a load and allow for the stress of probable slippage , as indeed they do at launching events where the drag chains are fixed to the hull prior to launch and prior to fit out .

Given the known weight of this vessel and the location sub-striate AND VALUE I was mildly surprised at the flimsy manner she was tethered yesterday .....but it was their back yard and they should have envisaged the strong possibility of it occurring .....and as you pointed out the manufacturers of this vessel and their use of light weight structure ...

[designeraccd]

At this rate she will become a second BLUCHER for this fjord.... DFO

[Little h]

HNoMS Helge Ingstad

So was it 'the wires broke' or 'the securing wires were unable to prevent'??

Based on the wires being unable to prevent - this latest development leaves me pondering a few questions .

Has any forum member seen an image that:-
- gives a lead as to the method used for attaching these 'securing' wires to the ship?

Well whilst it's not an image, at least a reference to there having been ... A total of seven fixing points welded onto the frigate’s hull were fixed to anchors on land.



A few excerpts from an article titled:-

That Wrecked Norwegian Frigate Is Pretty Much Toast
By Kyle Mizokami Nov 13, 2018

According to Naval Today, the Norwegian Navy said it has welded seven fixing points to the ship’s hull, each of which was connected to a steel cable anchored to shore. Pictures show several tugboat-type ships standing by, plus an anchor handling vessel investigating the sea bottom underneath the ship along with a Hugin 6000 autonomous unmannned undersea vehicle.

That was Monday. Early Tuesday, the Norwegian Navy announced that unexpected events had “complicated” the salvage operation. In other words, things have taken a turn for the worse. New photos show the starboard radar panel, which normally stands approximately forty feet above the surface, submerged. The port radar panel was barely above water. The tip of the ship’s bow is peaking just over the surface of the waves.

It’s now unclear what, if any, future the guided missile frigate has. Helge Ingstad was manufactured by Spain’s Navantia shipyard from 24 modules, with 13 watertight compartments. The ship is designed to stay afloat and moving with two of the compartments flooded. There were reportedly dry compartments still on the ship when it was abandoned. Although warships are designed to be corrosion resistant they are not designed to be submerged under salt water (ships other than submarines, anyway), particularly sensitive electronics.

Norway seems determined to salvage and repair the Ingstad, but realistically she may never sail again.

Popular Mechanics
---------------------------------

The following excerpts taken from Naval Today Posted on November 13, 2018


........... show the majority of the frigate underwater with only part of the mast and aft deck still above water.

The navy did not specify what caused the frigate to slip from the rocks in the night between Monday and Tuesday and sink further.

In an update on Monday, the navy said the frigate had been firmly secured to land with steel wires. A total of seven fixing points welded onto the frigate’s hull were fixed to anchors on land.

The navy further said plans for salvaging the frigate had been underway as anchor handling vessel Scandi Vega investigated the conditions of the sea bottom and a Hugin autonomous underwater vehicle mapped out the topography of the sea bottom around and below the frigate.

Plans were also in place for navy personnel to go onboard the vessel to evaluate the extent of damages that resulted from flooding and to try and insulate dry compartments from further water ingress. It is not clear how the latest development and the fact that the frigate is now almost completely submerged will affect the plans.

[ivorthediver]

Hmmm thanks for all your hard work there Harry , would love to don a rebreather and electrical under-suit and have a nose around myself ,just to find out who "miscalculated" not that this would bring her afloat , and she may well be the cheap skates option .."A con-structural loss" , or gutted ...once the sea lane is cleared perhaps

[Little h]

From; navaltoday.com - Posted on November 14, 2018 with tags HNoMS Helge Ingstad, Royal Norwegian Navy.

Raising HNoMS Helge Ingstad to take three weeks

An operation to raise the almost-submerged Royal Norwegian Navy frigate HNoMS Helge Ingstad following a collision in the Hjeltefjorden fjord on November 8 is expected to be completed within some three weeks, the navy has said.

Should all go according to plans, the stricken frigate will be loaded on a 140-meter commercial barge and transported to the Haakonsvern base by the first week of December.

Plans for salvaging the frigate got underway immediately after the collision while sea bottom mapping with autonomous vessels around and below the frigate is already underway. According to Norwegian media reports, dredging works that would allow the barge to approach the frigate are also underway.

In an update on November 14, the navy said Helge Ingstad was in danger of sinking even further as steel wiring with which she had been secured to land snapped in the night between Monday and Tuesday.

Following the collision on Thursday, the frigate was intentionally grounded and seven fixing points were subsequently welded onto the frigate’s hull and fixed to anchors on land in order to prevent her from sinking in deep water. However, as the frigate continued taking on water, the added weight snapped the steel wires and the ship sank further with only her mast and part of helicopter hangar still visible.

Norwegian company BOA Management and maritime consultancy DNV GL are now working with the navy to plan and execute an operation in which the frigate will be raised and transported to the Haakonsvern base for a first assessment of damages. The navy has not provided any info on whether the frigate will be repaired or scrapped as the majority of the ship’s systems have spent a considerable amount of time under water.

Source; NavyLookout @NavyLookout on Twitter