Length Over All

As there are no stupid questions, I 'll ask this one

How is the LOA measured? Is this the hull constuction as one bow to stern?

Or does it also include let's say the most outer distances of the sterndrive?

Someone told me that it only includes the fix parts of the boat. A stern or other drive unit is not a fix part as it could be removed.

I would like to know as for now I am still designing the boat at 7.40m hull only

Because if I make it >7.50m it would cost EUR 2.500,00 only to get the papers to put it in the water.

Greetz,

Daniel

 

Daniel,

Length overall is on the hull proper, from the forwardmost structural element of the bow to the aftermost structural element of the stern. A sterndrive would not be included in length overall.

Eric

 

Thx,

that reassures me in some way, otherwise I had to cut-in my design.

Greetings,

Daniel Peeters

 

If you are in EC, Loa does not exist. You should check Lmax (maximum length) and Lh (length of the hull) as defined per ISO 8666

Per ISO, an outboard engine is NOT included in Lmax, but the stern drive of an inboard engine IS included. (At least in 8666:2002).

Lmax =
This length includes all structural and integral parts of the craft, such as wooden, plastic or metal stems or sterns,bulwarks and hull/deck joints.
This length includes parts which are normally fixed, such as fixed spars, bowsprits, pulpits at either end of the craft,stemhead fittings, rudders, outboard motor brackets, outdrives, waterjets and any propulsion units extending beyond the transom, diving and boarding platforms, rubbing strakes and permanent fenders.
Outdrives, waterjets, other propulsion units and all movable parts shall be measured in their normal operating condition to their maximum lengthwise extension when the craft is underway.
This length excludes:
 outboard motors;
 any other type of equipment that can be detached without the use of tools.

 

THX for the reply,

I do live in the EC But as they mention on our gevernemental site, they only mention
"if the length is >7.50m then..." What length do they mean? I tried to get some info about it and after tons of phone calls someone told me what I wrote in my previous post.

They neither mention LOA, Lmax, Lh, nor the standards...

So here I am.

Greetz

 

i have recently noticed that ferretti, while building their new 83 tricked this limitation by making the forepart of the bow attached seperately to the hull and still get the boat accepted as a boat below 24 meters.

 

Yep indeed that is what I am doing now. Basic hull structure = 7.40meters and I attached an hatch like swimplatform of +/-80cm giving total length of +/-8m

Greetz,

 

Daniel,

The length they are reffering to would be Lh (for CE regulations), as this is the lenght that is used to determine in which category a vessel will fall with regard to Fire protection, stability, amount of inspections (assessment module).

 

Interestingly the USCG measures from the bow to the rudder post.

Since few operators have a license over 100T , the dinner boats have stuck the rudder as much as 40% from the stern in desperation to keep the boat under 100T.

Watching these fellows attempt to dock in NYC where the current can run at a REAL 4 or 5K is great entertainment .

Of course reality and government seldom mix.

FAST FRED

 

Length over all (LOA) as defined by Eric.

May i add. Any appendages that will be added to the bow and stern (or transom) is not included. That means if you add a bowsprit or a swim platform, that is not included. a jet drive sticking out is not included.

Load Waterline (LWL) or Designed Waterline (DWL) is the horizontal line of the immersed part of the boat measured from the intersection of the bow perpendicular to the waterline(FP)and the intersection of the vertical or angled stern (or transom) to the waterline (AP).

Length Between Perpendiculars (LPP) is measured from the foreperpendicular to the afterside of the rudder post. That is if you have a rudder sticking out of the bottom of the boat.

There are other definitions, sometimes confusing depending on what classifying society you are reading. In general the above will suffice.

 

Nilo,

Good observation re: Feretti. LH does not include structure that can be removed. This also comes into play with ISO stability requirements. If they had molded the bow structure into the hull or deck, the boat would have stability requirements based on the full length. There have been instances where this was enough to lower a boats CE category a notch.

 

agree aboatguy, but ferretti is not the only one. akhir 85 is also registered as a boat under 24 meters and no doubt both akhir and ferretti are known as the best in the market for production boats of this size.