The HI had a valid Seaworthiness Certificate and had been receiving a Class notation by DNV-GL: [image] Norsk selskap godkjente KNM Helge Ingstad før ulykken Både klasseselskapet DNV GL og Forsvarets materielltilsyn godkjente krigsskipet i april i fjor. PS> No…

dThoses inflatable (if I have it right) shaft seals seem like a good idea. The designer doesn’t have to anticipate a scenario in which they would be needed, just recognize that the openings for the shafts to pass are weak spots. A problem with the shaft seals is one of those things that go from tot…

[image] ombugge: https://www.nrk.no/hordaland/unike-undervannsbilder-viser-de-enorme-skadene-pa-knm- helge-ingstad -1.14341000 Working link While I, for one, am interested in seeing photographs of the damage, they are not very useful for our speculation and analysis - all I’m seeing is twis…

[image] Tupsis: Working link While I, for one, am interested in seeing photographs of the damage, they are not very useful for our speculation and analysis - all I’m seeing is twisted metal with hardly any reference points. They were lucky that nobody died. Nevertheless I think they could w…

[image] Kennebec_Captain: I’m going to bet when the ship gets raised the stbd prop is either going to be heavily damaged or gone. Well, the divers have had a month to film the starboard propeller and the hull around it, but … there are no pictures.

Yeah, looking like less of a good bet. I revise it to a bet that the AIBN initial report is going to be found essentially correct.

[image] SirKraken: The same thing is why they would not use auxiliary electric propulsion to get the ship to nearest port. Was the emergency power not sufficient to power the electric propulsion ? The generator room was flooded quite early apparently, thus main power supply lost. Emergency g…

The frigate will probably not be raised until after Christmas. – The movements are monitored continuously. The ship is being secured both by land and underwater with remote-controlled robots. Maintenance of the straps and possible reinforcement of these straps are assessed on a continuous basis, s…

Assuming that the shaft seals in the gear room did in fact fail there is going to be a great deal of interest as to the cause, from damage or faulty design, shipyard error or some combination.

[image] Kennebec_Captain: Assuming that the shaft seals in the gear room did in fact fail there is going to be a great deal of interest as to the cause, from damage or faulty design, shipyard error or some combination. I agree. We are talking about four shaft seals installed 10 years ago. I m…

They have reportedly installed inflatable bellows as an interim measure on the sister ships.

Frigate Helge Ingstad Design - Damage Survivability - #114 by Kennebec_Captain - Professional Mariner Forum

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