Topic: Passengers rescued from Arctic cruise ship crash

QUOTE:

Hiya Propshaft,
Love all the chat and info that's come out since our earlier posts. Canadian waters cease after 3 miles from the coast and then it's international waters I am led to believe. If I am wrong, some one will tell me. Thats the learning curve.
Liz, if you hit water in the home counties, the wings will land on the pool sides, causing the body of the plane with us in it plopping into the water. Thus escape drill in water is required, along with a tongue in your cheek.
Tara,
Alan.

coronation gulf where the incident took place is actually a gulf inside canadas territorial waters. There is a charted and surveyed shipping track going east/west across the northern side of the gulf with a min depth of 20 metres,,but everone has been there,done that,so the expidetion/adventure ships are going off road with the resultant risks.

jim

Quote: Squat, this only happens in shallow water and depends on the ships speed and draft and the effect is more often seen at the bow (there is a formula for calculating squat, but it is so far back in my memory it wont come out)
I thought it was more to do with speed than depth, the faster the ship goes the lower it settles, of course if it's shallow the more is the chance of hitting the bottom and pulling out the plug, :D it’s possible that density or salinity has also something to do with it, but I suppose that’s all worked out by pencil wielding professorial types.
Quote: coronation gulf where the incident took place is actually a gulf inside Canada’s territorial waters. There is a charted and surveyed shipping track going east/west across the northern side of the gulf with a min depth of 20 metres, but everyone has been there, done that, so the expedition/adventure ships are going off road with the resultant risks.
H'a Ha now were getting to the nitty gritty, so it's the skippers fault for wandering off pist’e

QUOTE:

Quote: Squat, this only happens in shallow water and depends on the ships speed and draft and the effect is more often seen at the bow (there is a formula for calculating squat, but it is so far back in my memory it wont come out)
I thought it was more to do with speed than depth, the faster the ship goes the lower it settles, of course if it's shallow the more is the chance of hitting the bottom and pulling out the plug, :D it’s possible that density or salinity has also something to do with it, but I suppose that’s all worked out by pencil wielding professorial types.
Quote: coronation gulf where the incident took place is actually a gulf inside Canada’s territorial waters. There is a charted and surveyed shipping track going east/west across the northern side of the gulf with a min depth of 20 metres, but everyone has been there, done that, so the expedition/adventure ships are going off road with the resultant risks.
H'a Ha now were getting to the nitty gritty, so it's the skippers fault for wandering off pist’e

yes speed is the prime mover in squat,but squat can increase in shallow water,BUT give a ship a UKC of 0.5 mtre and squat calculated at say 12knts,then surprisenly pilots will tell you that squat does not raise its ugly head.
Of course it is the master who has ultimate responsibility for the safety of the ship and passengers/crew and he cannot abdicate this responsibility regardless,even tho the Md may be on board,pilot,including ice pilot and expedition director.

jim

QUOTE:

Squat, this only happens in shallow water and depends on the ships speed and draft and the effect is more often seen at the bow(there is a formula for calculating squat,but it is so far back in my memory it wont come out)
As i have mentioned before those cruise routes are barely surveyed and then only show ship track soundings,which are not 100% accurate,In my opinion squat would not have played a large part in that vessels striking as her draft would not have been large and speed would have been moderate.
Bye the way its the highest tide of the year felixstowe/harwich,but we dont have a bridge to match the "great belt bridge til one gets up to Ipswich and cruise ships dont get up there,so feel safe to sail in today

jim

This should help your memory Jim

It has the calculation in case you ever need it to help out on your next cruise ;) :D :D

www.acme.pwr.wroc.pl/repository/179/online.pdf

QUOTE:

This should help your memory Jim

It has the calculation in case you ever need it to help out on your next cruise ;) :D :D

www.acme.pwr.wroc.pl/repository/179/online.pdf

No thanks Spartan,Formulae and other technical knowledge,have now been long banished to the deepest recesses of my mind.i now go on cruises to have a good time and think of times past.

jim

Hi Guys, how interesting is that, (online.pdf) doesn’t it all become crystal clear when it’s properly worked out in allegorical formula and illustrated by symbols. ;)
Tut Tut, I guess the captain of the QE2 just hadn’t read the squat formula, and that’s probably why he scraped the bottom of his ship on the plug

Hi, propshaft and all who have contributed to this thread,
I am now on a squat on a plug, floundering in Canadian waters, looking in askance at the QE2's Captain and thinking "If he can't sort it out, what chance for me, Just get a drink in and recite I must go down to the sea again, to the lonely sea and the sky, and I need is a tall ship, and a star to steer her by. (Sea Fever, Masefield) and I've got it."

So you are bobbing up and down on the briny, isn't it great when you can keep in touch with the rest of the world.
My pal is over there at the moment on a cruise, and train ride, the ship is the Zuiderdam
Have a nice holiday and return refreshed.

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It was only the existance of this "Hydrodynamic Squat" that allow " Oasis of the Seas" to clear the bridge joining Denmark and Sweden. Think what a mess there would have been if the calculation was wrong or the tide was not quite right!!

We were aboard the Navigator off the Seas when it went under The Oresund bridge a couple of years ago.
We followed a large container ship going through at full speed and
they cleared it by 90cm and that was from the captain.
Cant forget the look of a lorry driver seeing us passing below him.
Wondered then if they were testing the route for the IOTS as no big ship has gone that way since and the IOTS chose the other longer route from Finland.

QUOTE:

We were aboard the Navigator off the Seas when it went under The Oresund bridge a couple of years ago.
We followed a large container ship going through at full speed and
they cleared it by 90cm and that was from the captain.
Cant forget the look of a lorry driver seeing us passing below him.
Wondered then if they were testing the route for the IOTS as no big ship has gone that way since and the IOTS chose the other longer route from Finland.

well all depends what you mean by big,some of the ships that carry more passengers have a smaller air draft than others and whilst on the Arcadia we passed under the 2great belt bridge both in and outand it was quite impressive sitting up in the crows nest.

jim