Oh, that’s different in my school, they hate giving written exams, so last year I had only 2 written and 14 oral exams. They aren’t too neutral and boring either, always sarcastic in making fun of us, but still friendly enough to tell whether it was a good or a bad exam. What I do hate is that it’s sometimes obvious that there little talks are just meant to erase your short-term memory! But sometimes they start making some small conversation after the exam, so then you know it’s good meant.
C’est en franΓ§ais mon ami, c’est pas clair pour le plus grand part de la peuple ici.
But it’s quite litterally the same as the other article.
I think a falling leaf is just putting your ballast tanks full, moving straight down (no propulsion),to test the limits. But instead of going straight down the submarine is shaken from front to back, like a falling leaf…
Just an idea though…
Haha, Ben, saying “gij” to a teacher? I don’t think I’d have to try that (nor do I think that’s smart, although you can estimate to whom you can say that and to whom not)… Someone of my class once said “Meneer(=Sir)” to a captain/teacher, he said: “kapitein” will suffice! Normally “mijnheer” is quite ok, but not for these guys…I suppose if you say “gij” he’d just kick you out ;).
In the series “How big can we get”: The largest ship in the world: Jahre Viking (well, it used to be…, now she’s renamed and rebuilt (with helo platform etc.) to act as a Floating Storage and Offloading platform in a Bahrain oilfield.

This monster has a capacity of 564,000ts (5.5 supercarriers π ), is 458m long, a beam of 68.66m and a draught of 24m (can’t safely sail the North Sea).
Now she looks like this:
She’s called Knock Nevis now, I suppose you can find some car on the cay and then you can make the comparison :p .
Since I talked about the propulsion things, here is the new stuff:
-Counterrotating propellors (I think these are very difficult in technology.
-The Azipods, which are more widely used nowadays and will probably gain more in the market.
-The combination of a normal propellor with a azipod “rudder”. The azipod turns in the oposite direction, acting as a counterrotating propellor, then, when the ship is getting closer to port, the main prop quits turning, the azipod takes over the lower speed propulsion and of course makes an excellent steering mechanism: The FUTURE!!! This will probably be the propulsion for the future planned 13,000 TEU container carrier.
Although it should be noted that the azipods, and in specific the electro azipods are technically unreliable and prone to errors…
Jumbo doing overturn, what do you mean by that? I think you’re suggesting she doens’t steer well? Well if so, then that’s the art of steering a ship, you have to be smart and steer in the required direction for a few seconds, then you’ll see on your rate of turn meter what she’s doing. Then you’ll steer in the oposite direction for about two, three or four times (not sure, since I don’t have time to measure every period, other things to look out for when you’re steering) as long as you did in the direction you wanted to go. So, basically, you just give it a push untill it goes into the required direction and then you have to start pulling her back to stop turning for a very long period. (first time taking a large turn with a large vessel, I had an overshoot of 10Β°, officer was asking what I was doing…)
No, Himanshu, the shaft is mostly very solid kept in her tunnel, except in the engine room of course.
Since no one else is giving it a try: it’s the pipe duct. Just above the keelplate of a bulkcarrier (and other ships) you have a tunnel, where pipes run to ballast tanks, double bottom fuel tanks etc. Next to that is mostly a rail with a chart, which you can see here. It’s meant to transport heavy tools etc. But of course, there is nothing more fun to lie on this car, pull it to the front and let it slide when the ship is pitching. For the ultimate kick, you just turn off the lights and it’s fun when your ship is 200 or 300m long and you don’t even have to pay to do it! π
here’s Berge Stahl, the world’s largest bulkcarrier. She, in all respects, dwarves a US “super” carrier. Her measurements: length of 343m, beam of 65m (that is not just a deck, that is the entire hull, for a carrier the beam is only 40m) and carries 360,000ts of Iron Ore (Indeed about 3.5 supercarriers!). SOme nice shots from her last repair/maintenance in Rotterdam (her route is Rotterdam to Brazil in 5 weeks) Rotterdam is the only port in Europe that has a terminal large enough to accomodate this ship.
Note the little blue guys near the rudder and propellorshaft.


hmm, by what was this tsunami created? :p
I think when there is a large surface impact the sub might already be dead (eg large meteorites, 200ft wave is very tall, won’t be generated by an ordinary planecrash). Hence a more modest wave of 20m (about 60ft) would be more accurate/possible I suppose. These waves happen more too (called freak waves, waves taller than 18m, while all the surrounding waves are “only” 12m tall). With this hight, the questions comes to mind: do submarines often sail close to their collapse depth? I don’t think so, not like 20m above it, too risky for dayly operation. And a 20m wave won’t necessarily have the weight of all the water it contains, since it’ll have an upward acceleration (hence it’s formation).
But then theoretically seen I suppose you’re right, it might pose a danger to submarines, when they are very unfortunate. (we don’t have trouble with that kind of things π , occasionally a bulkcarrier sinks by a 25m freak wave, but that’s it )
The picture shows (Gorshkov/Vikramaditiya :p ), this is caused by “painting stresses”, wave piercing. The constant load and unload of the oncoming waves. I think a very strong pressure wave might do the same with a submarine’s bow, certainly when you consider they have a relative “soft” nose (with the sonars) compared to these ruggid merchant ships.
I don’t really agree with Jonesy,
Normally when such things happen, a wave is only formed in shallow waters. So at 3,000m deep, the energy will go horizontally, when it reaches shallow waters, it is directed upwards and forms a wave. That is also why no real shipdisasters happened during the seaquake, the surface ships probably hardly noticed it. Maybe by some extraordinary swell or current, but that’s about it. It’s only when you’re close to shore that you’ll have trouble with the formed wave/tsunami.
As for submarines, since they’re below the surface, they are in the horizontal zone where the energy is mostly moving, hence the second effect jonesy mentioned, the pressure wave, is indeed there and very dangerous.
I don’t know too much about a submarine’s stability, but basing my thoughts on surface ships, it must be very hard to stabilize a submarine and I think it is therefor not that stable. The pressure wave could tip it over. It could also damage the sub enough to disable it, hitting diving planes, ballast tanks etc.
One thing is sure, I wouldn’t want to be on a submarine when such things happen!
yeah sorry, made small mistake in the mind, P-500, P-700… I don’t have the JED article, but I don’t need it either. I’m not that interested in this missile anymore, and I read enough stuff about it, I posted that somewhere in the “Russian Attack Capabilities” Thread, maybe it’s an excerpt of the JED article? Don’t know it anymore.
Anyhow I didn’t know that about Yakhont, thank you very much!
well I go to school NOT to become like this bunch of busted crap!
that’s some crappy sources you gave….
The range of a missile’s radar is quite secret, counts for this missile too!
They share information by a data link.
The missile itself is not capable of distinguishing a carrier from a destroyer, but it has a satellite link towards the command ship. Onboard that vessel, they distinguish the ships and guide the weapon (well, that’s the way Sandbox does it, but considering the Slava and Kirov have the same satellite antennae, it probably works the same way)
Granit is the first? Russian missile to carry ECM, to what extent is of course not known.
The US-A satellite had a link to the ship, I don’t know whether it had one to the missile too, maybe they used different satellites for that, as not to overload the US-A sats. I don’t think it was accurate enough either, so an interface between the rough image of the Kasatka-B system and the missile’s own radarview would be nice!
Here are some pictures already!
First one is from the brigde of a container vessel. The requirement (and limitation) for stowing containers on deck is, that you have to be able to see 500m in front of your bow. That’s why containers are stowed in a “stair” kind of way. As you might have noticed, this problem could be denied by placing the bridge in front, which also has the advantage of protecting the containers from overcoming waves! This idea is in consideration, but it’s a disaster for us, since everyone will puke the guts out of his body then!
I can post some pictures about the future developments too, future propulsion methods (well some are in service, hence the pictures). In propulsion we are some steps ahead of Navy. Nowadays we are also into silencing, since some new regulations see “noise” as pollution too, so there come the skewed propellors for merchant vessels. (skewed props make less noise by stressing the ends of the propellor blades more)
Second picture, I’ll let you have a guess where and what it is!
Well, first of all, piracy is not the greatest concern, as said, it’s on high seas and mostly the pirates don’t have the vessels to attack in those waters. Armed robbery on the other side, has become a huge concern, that’s where most casualties are made. The number of 216 was not even correct, that seemed to be the number of the first quarter of a year, don’t know the exact number for the entire year… Onboard, you are warned by the Navtex, it prints out “Piracy Reports”, where they describe the place and type of attack (and casualties and stolen goods). Most these attacks happen near the South-Indian Coast and Malacca Strait, mostly in anchorages (certainly the anchorage at Singapore). Mostly these attacks are done by more than one small boat that approaches from the stern, because the huge funnel blocks the radar in that part (blind spot). Also because the freeboard of the ship is smaller there (better for mooring gear), so they have to climb less. We are not allowed to carry weapons (although some companies give the captain a gun in case there would be a mutiny, very likely in that company Vaiar mentioned π ). That leaves us with very little to defend, on tankers they use the foam canons to “blow” these guys off, on other ships they use the firehoses, most of the time fastened to the fences (no one outside, because they could start shooting at you).
UN doesn’t have any fleet against that, some countries do work together to fight this, US for example has a good cooperation with the Dutch and Belgian Navy for Drugbusting ops in the Caribean (one wonders why US has such a large Coast Guard and Navy, their Coast Guard likes to annoy the merchants more than they try to do something about the drug traffic).
I think nowadays, some talks are going for guarding the Strait of Malacca, when we were anchored at Singapore, there was a guard vessel just outside the port, but I don’t know how they would come to aid…
The other question, no, they also attack large vessels. But mostly, they don’t highjack the large ones, since they don’t know what to do with it. They don’t have installations for unloaded Crude Oil or liquified Gas. On General Cargo and sometimes containers, they can sell the cargo, mostly they repaint the ship when still at sea and give it a different name. So afterwards they use it too.
On the Tankers and Gascarriers, they mostly attack for food, money and electronics (cameras, TVs,etc.) and leave as soon as they have what they need.
One Piracy Message I recall went like this:
Anchorage in Indonesia, seven small crafts approached a tanker, the tanker’s crew reacted by using the lights and the small crafts fled. Shortly after, the boats approached a tug, they put the crew overboard and fled with the ship.
(I do hope they put the crew in a lifeboat, although that was not even mentioned).
Pictures, that takes a bit too long for now, I’ll do that later, but I can tell you that taking pictures of radarstations is not the smartest thing you can do! (Normally you’re not even allowed to do that from within 1-1.5m of the radarscreen). Engines are more fun. It’s hard to get a full picture of them, since they are mostly six floors high… But I’ll see what I can find.
Vaiar: Is die kadet een marine cadet of een koopvaardij kadet, als ie van de marine is, dan vind’k het wel heel raar dat ie op een koopvaardijschip stage moet lopen, bij ons gaan die allemaal in de zomer met een mijnenjager of de Godetia mee!
Quite bad for him, onboard we had two bars, one for the ratings, one for the officers, both were equiped with a large screen TV, DVD player, Video recorder and Playstation II, also a very large stereo was there. A large collection of movies (approx 500), music cassettes and cds (400) and a library. We also had an improvised pool.
On large tankers they mostly have a sauna (with the exhaust pipes going to the funnel) and a pool.
I don’t know, but not for containers I think. I’m very fond of all kinds of tankers and bulk carriers. We did visit the Hessen-NoordNatie container terminal in Antwerp this year. I would like to work for Shell… I’m also looking into the RFA! But I think only Commonwealth members are allowed there.