Anyone know what these nautical terms mean?

[m1spw]

I've got an Economics question on economies of scale to do, and its about tankers. I just don't understand some of the terminology as its about super tankers.

I have:
-conventional takner, 10 metre draft; 28,000 dwt
-restricted draft tanker, 10 metre draft, 42,000 dwt
-ultra shallow draft vessel, 10 metre draft, 105,000dwt
-conventional tnker, 16 metre draft, 105,000dwt

What is 'dwt' and what is 'draft'?

[gasblaster]

draft is the depth of water the boat takes up. i.e. the distance from the surface of the water to the bottom of the keel.

DWT I am guessing is dry weight, i.e. weight of ship without cargo or fuel.

[Raify]

I think that

draft: means the depth of the hull under the water line
dwt: dry weight tons

But I'll check with the shipping line next door... brb

[Rob Ustly]

Deadweight tonnage, ie maximum weight a ship can carry before the crew have to get the buckets out.

[Incorrigible]

105,000 tons

before you put anything in it

[gasblaster]

Whoops - google is your friend.

DWT = deadweight ton, the amount a ship can carry in metric tons.

[FrenchTVR]

IIRC draft is the depth that the ship sits in the water. DWT is dead weight tonnage.


Just as a matter of interest, the largest tanker afloat (Jahre Viking) is so big (546,000dwt) it cannot use the English Channel with a full load :getsanorakandleaves

>> Edited by FrenchTVR on Monday 5th December 12:04

[shadytree]

FrenchTVR said:

Just as a matter of interest, the largest tanker afloat (Jahre Viking) is so big (546,000dwt) it cannot use the English Channel with a full load :getsanorakandleaves

Here you go Mick

[GreenV8S]

I'm not going to answer your question directly because I think the whole point of this is for you to work out the answer.

For 'draft' do a google for 'ship draft'. It's a fairly common term but you could be excused for not knowing it.

For 'dwt' you can find the term used on google, but I expect you can guess at this anyway if you consider how 'economies of scale' might relate to ships?

Edited to add: too slow, I see that other people have already answered your questions in full.

>> Edited by GreenV8S on Monday 5th December 12:08

[Incorrigible]

anonymous said:

[redacted]

Noticed that I'd been pipped to the post by the right definition

So dwt is boat + cargo yes ?

[FrenchTVR]

shadytree said:

FrenchTVR said: Just as a matter of interest, the largest tanker afloat (Jahre Viking) is so big (546,000dwt) it cannot use the English Channel with a full load :getsanorakandleaves Here you go Mick

Thanks Stu


b'stard

[Raify]

GreenV8S said:

I'm not going to answer your question directly because I think the whole point of this is for you to work out the answer.

A bit harsh. It's only an Economics question, they're just using ships as an example. Learning maritime terminology is hardly a requirement of an Economics student.

[m1spw]

anonymous said:

[redacted]

Thanks, I was just about to ask if DWT includes the boat or not.

[m1spw]

GreenV8S said:

I'm not going to answer your question directly because I think the whole point of this is for you to work out the answer. ....... Edited to add: too slow, I see that other people have already answered your questions in full.

These aren't the actual questions, I just needed to know what the terms meant. The actual question is about how within shipping economies of scale have a limited application because of restricting factors such as port depth.

[Raify]

Shipping line next door have just confirmed:

dwt = weight of cargo on ship (not the ship itself)

[m1spw]

Raify said:

Shipping line next door have just confirmed: dwt = weight of cargo on ship (not the ship itself)

Thanks!



BR

[Raify]

anonymous said:

[redacted]

Where's that w*nker smiley when you need it!

[eccles]

just out of intrest, is C of G an issue when loading cargo in a boat?

[m1spw]

anonymous said:

[redacted]

I tried DWT on google and it didn't come up with anything useful in the definition section thingy. Draft I fund but I wasn't sure if it ws the depth of the tanker, or just the bit under water.

Anyway, thanks for all the help guys.