Sans Bateau
Well-Known Member
Err, no. The 6 deg is on the control head of the autohelm. The wind angle is just out of shot. It is on the instruments that has 'wind' on it, bit of a give away!
YM Lies, Damn Lies and Statistics
- Thread starter shaunksb
- Start date
Err, no. The 6 deg is on the control head of the autohelm. The wind angle is just out of shot. It is on the instruments that has 'wind' on it, bit of a give away!
Sans Bateau
Well-Known Member
Sorry Galadriel, couldn't resist being daft.
I always think of land as the yellow bits on charts, or as the thing that the boy in the crow's nest spots on the horizon. Not the mud underneath the keel. That's ground. Hence SOG (as you say) and COG, not SOL and COL.
Yes I should have put
at the end of my post. 
kingfisher
Well-Known Member
You are converting and then blaming the metric system for forcing people to work with 'difficult' numbers. That's like advertising an RM1200 yacht (metric) as an RM39,37(imperial). In a truly metric system, yachts will be numbered in whole numbers.
Besides, for a long while now, a Bavaria 32 doesn't actually measure 32ft. Give me one yacht where the length is equal to its name.
Uncomfortably large numbers, like the BMW 735 or Merc 220?
Ubergeekian
Well-Known Member
Victoria 26. LOA 26' 0"
theguerns
Well-Known Member
metric
I agree with you weatherman. All the world except the usa which dont count use metric isnt it about time we forgot ft and ins and set a standard then there wouldnt be confusion
I agree with you weatherman. All the world except the usa which dont count use metric isnt it about time we forgot ft and ins and set a standard then there wouldnt be confusion
T
timbartlett
Guest
I can't (and won't) comment on YM in general or this particular set of figures.
But I will say that when I was Technical Editor of MBY, we generally took the manufacturer's word for basic statistics. After all, if they don't know how long and wide their boat is, who does? And if we measured it with a tape measure and got a different answer, who would you believe? Who should we believe?
So when we were provided with a single set of figures, we laboriously converted them all. And we tried to remember to account for things like a gallon being smaller if the data came from the USA, or if it came from some yards in the far east. And we tried not to slip a line in the conversion tables. And we tried to decide whether the length over all really was "overall" or whether it arbitrarily missed bits off etc. etc.
But when we were provided with two sets of figures (imperial and metric) it's amazing how often they didn't agree with each other!
fireball
Well-Known Member
And what did you do then? take an Average? Take one over the other? Publish both - even though they didn't agree?
Problem is - if you go back to the source you could either wait an age for someone to come back to you thus missing deadlines or, when they do give you an answer in time it could be just as wrong as the original stats!
LOA and Beam are easily measured, but keel & weight gets a bit trickier - unless someone pays for a lift - and then, what do you include? Bare weight, Weight of the vessel as delivered (with rig), sailing weight - tanks full/empty? So you're onto a looser if you decide to measure yourself too!
JomsViking
Well-Known Member
On the weight issue: In the harbour office we actually have a book with real-life weight for boats, as they are often somewhat heavier than the manufacturers figure - even when considering that they use the dry weight.
chewi
Well-Known Member
horses for courses
I use both imperial and metric in large and small scales. If I say something is a bout 6 inches then its somewhere between 5 and 7 inches , not 152.4 mm to 4 sig. figs and I can usefully estimate a room size in feet, but not in mm, cm or even metres. Likewise about a metre doesn't imply the accuracy of 39.37 inches.
On a much smaller scale I can work in integers thousandths of an inch, without pretending their accuracy in microns.
I use both imperial and metric in large and small scales. If I say something is a bout 6 inches then its somewhere between 5 and 7 inches , not 152.4 mm to 4 sig. figs and I can usefully estimate a room size in feet, but not in mm, cm or even metres. Likewise about a metre doesn't imply the accuracy of 39.37 inches.
On a much smaller scale I can work in integers thousandths of an inch, without pretending their accuracy in microns.
Woodlouse
Well-Known Member
I find imperial units are much better when being vague about measurements. Metric just has something clinical and precise about it, despite a mm being far bigger and more unwieldy than 1/64ths of an inch.
Baggywrinkle
Well-Known Member
YM measurements
Perhaps they lost their sense of scale due to the tardis like dimensions of the aft cabin.
Luxury I say!!
I grew up in a family of 5 who spent 2 weeks every year trying to complete a round trip from Inverkip to Ardnamurchan Point in a Kingfisher 20+ - just so we could tie a piece of heather to the pulpit. Happy days.
Boats under 40ft shouldn't have an aft cabin ... what nonsense!!
As for metric and imperial, the Americans, as well as spelling things incorrectly don't use the right pints or gallons either.
Perhaps they lost their sense of scale due to the tardis like dimensions of the aft cabin.
Luxury I say!!
I grew up in a family of 5 who spent 2 weeks every year trying to complete a round trip from Inverkip to Ardnamurchan Point in a Kingfisher 20+ - just so we could tie a piece of heather to the pulpit. Happy days.
Boats under 40ft shouldn't have an aft cabin ... what nonsense!!
As for metric and imperial, the Americans, as well as spelling things incorrectly don't use the right pints or gallons either.
JomsViking
Well-Known Member
And that's really confusing, although I prefer an Imperial Pint when ordering beer. It is another good reason to standardize - whether it should be metric or not is another discussion, however as someone stated previously, it is widely in use
Bosun Higgs
N/A
The real question Galadriel is when does your boat appear in the small ads - cos that's usually what happens after a second hand boat test.
Bosun Higgs
N/A
The metric system is highly logical as you would expect from something French. Trouble is that the units are not particularly handy sized - and inch is much better than a cm for everyday use, just like a pint is better than a litre particularly for beer and milk. I find myself happily hopping backward and forward between metric and imperial.
The use of imperial for boats comes about because the first big leisure yacht building industry was in the UK. It will slowly change.
Bosun Higgs
N/A
I do wonder about this sort of data in both directions. We have a similar 35 ft boat and see 7.5kn on the log when close reaching and the log is zeroed against the gps in the tideless area behind the barage. So it should be right. But at the same time, when I download the tracks from the Garmin after a race for analysis, the data never shows an average speed as high as the log indicates. Usually its got a 6 in front.
No disrespect to Galadriel but I'd never believe an owners figures anyway. But these days I dont believe the GPS either. And I dont believe those polars either but why they would print ones that are low, I do not know.
Funny old world.
Sans Bateau
Well-Known Member
The real question Galadriel is when does your boat appear in the small ads - cos that's usually what happens after a second hand boat test.
You couldnt afford it!
Sans Bateau
Well-Known Member
Our average speeds that I have quoted are from channel crossings, so a long enough period with a variety of conditions, averages over a period are far more meaningful. We start the time from when we hoist the main and stop the clock when we come along side in Northney. 6.6 knts in a 4 or 5 has been achieved on several occasions, not every time of course.
Ubergeekian
Well-Known Member
An awful lot of stuff in german is sold by the Pfund (pound, 500g) and Halbpfund (250g). Quote a few Zolle (inches) around as well, and 19mm seems strangley more popular than 20mm for drive shafts and the like
I'm not sure. Hunter did metric boats (I have a 490) thirty years ago, and the later version of the Victoria 26 was the Victoria 800. People just keep regressing to imperial...
fergie_mac66
Well-Known Member
Maybe they are related to anglers and maybe their swmbos really dont know what a 12 inches are !!
mcframe
Well-Known Member
Car tyres.
Section in mm, aspect ratio as %, rim diameter in inches, load index in Kg, speed ratings in kph.