Cajun HP rating for tugs

How is that companies claim they have 13000hp tugs running EMD 16 645s. Do the companies leasing them just accept that the number is total bullshit?

Any examples or proof as to your claim?

All the Harvey tugs. They say they are 13000hp class tugs when they are 10000hp

Looks like Crosby does it as well.

Do they have kort nozzles? If they do, that is probably how they do it.

Plus, other than people in the industry, nobody knows the difference between a 16cyl EMD 645 and and CAT 3616. It’s a marketing ploy though I LOVE having kort nozzles on my thrusters… .

A good rule of thumb for a lot of the small hawser tugs with nozzlesis to divide the stated horsepower by 2. With open wheels it seems more arbitrary, but they seem to go with a pretty sizable increase in paper horsepower when there is a high reduction gear (ex. 1800 hp w/ open wheels might be called a 3000).

Horsepower has nothing to do with kort nozzles. The reduction gear may effect the shaft horsepower, but the nozzles only effect bollard pull.

[QUOTE=Capt. Phoenix;65188]Horsepower has nothing to do with kort nozzles. The reduction gear may effect the shaft horsepower, but the nozzles only effect bollard pull.[/QUOTE]

That is a very interesting fact, but that doesn’t change my response. Please pardon my poorly worded and poorly typed initial response, but what I was trying to point out was the fairly consistent method that oil field service tugs use to class their vessels. They frequently double the horsepower “class” when the tug has nozzles.

Crowley Maritime was the first to start this nonsense with their 9000hp INVADER class tugs back in the 70’s. Those boats were 7000hp so where did the magical 2000 extra HP come from…generators? Who the hell knows? No surprise that other companies to the same BS but at the end of the day, it is BOLLARD PULL that determines a tug’s true power.

>50T= light duty
>100T= medium duty
>200T= heavy duty
>300T= extra heavy duty
>400T= super uber mondo extra heavy duty

.

That’s interesting. Maybe everyone looks at the bollard pull strength and pays no attention to the HP.

[QUOTE=kfj;65172]How is that companies claim they have 13000hp tugs running EMD 16 645s. Do the companies leasing them just accept that the number is total bullshit?[/QUOTE]

Same way as companies with two (or more) tugs with the EXACT same EMDs with blowers and turbos call one of them 4300hp, and the others 4000. Since the SOLAS boundaries are changed when you get over 4000 hp. I KNOW my tug is 4300. But the paperwork says 4000. I guess the ones with the toys makes all the rules. Us with no toys just gets to play with them for while!

And the thought that leasing companies are bright is an assumption. They aren’t, or they would catch this kind of BS. (Or the extra case of scotch, or box of Cubans wouldn’t make up for it!

This is what happens when ‘marketing’ is in charge, and no one knows the difference! (But PLEASE don’t tell them that… They wouldn’t know HP if it hit them in the face)

>400T= super uber mondo extra heavy duty.

lol

>400T= super uber mondo extra heavy duty.

lol

The sad part, I’m sure that’s a lot of the truth right there.

[QUOTE=ryanwood86;65201]That’s interesting. Maybe everyone looks at the bollard pull strength and pays no attention to the HP.[/QUOTE]

The smaller tugs don’t have bollard pull certs. How many tugs under 4000 hp have them?

That’s interesting. Maybe everyone looks at the bollard pull strength and pays no attention to the HP.

To my recollection the rest of the world doesn’t even use HP in rating the power of their tugs. It is almost entirely in bollard pull.

[QUOTE=c.captain;65198]Crowley Maritime was the first to start this nonsence with their 9000hp INVADER class tugs back in the 70’s. Those boats were 7000hp so where did the magical 2000 extra HP come from…generators? [/QUOTE]

This begs the question, how many HP does the Invader make when it’s halfway underwater?

This begs the question, how many HP does the Invader make when it’s halfway underwater?

HOLY SHIT! I wonder what caused that drydock to sink…it wasn’t that old! Crowley cannot be happy over this development.

As an aside, it has always amazed me that the 9000’s (INVADERS) were built with such little freeboard. When all tanked down there is no freeboard. Damed that must be some very wet boat in a big sea!

Do you realize that those boats are now almost 40 years old! Still they are classics in every sense of the word and still have plenty of “smash”!

As an extra note: all you brownwater GOM mariners notice the tall mountainous background covered with green trees…the wild west where the weather is wicked and the water is deep. None of your Belly Pass/Port Flushoon there! That’s real mariner’s country that is!

[QUOTE=c.captain;65215]
Do you realize that that class is now 40 years old![/QUOTE]

Haha, I realize it every day

Not on an Invader but a Sea Swift

It’s the equvilant of all the crewboats saying they run 20+ knots when in fact its runs 15kt and 17kt on a good day.