Measurement process

Graham_Snook · Post by **Graham_Snook** » 29 Aug 2006, 18:59

Just a few questions about having my IOM measured

I don't have access to a float tank. So, as far as I can tell I think I'm within the 420mm draft, but if during measuring it's found to be say 1mm over, am I allowed time to file 1mm off the top of the fin so it reduces the draft? Or will this be at the discression of the measurer?

Likewise if I find that my scales at home are over reading, can I add weight to bring it up to 4kg there and then?

Also I have a bung that sticks out of the transom (about 5mm, but over the 1000mm loa) just for drainage when I'm club sailing....my intention is to just cover this with tape when it's measured...is there any thing against doing this?

I realise this might open a can of worms, but we don't have a measurer in my club

Many thanks

G

Lester · Post by **Lester** » 29 Aug 2006, 20:52

Graham_Snook wrote:I don't have access to a float tank. So, as far as I can tell I think I'm within the 420mm draft, but if during measuring it's found to be say 1mm over, am I allowed time to file 1mm off the top of the fin so it reduces the draft? Or will this be at the discression of the measurer?

Hi Graham

I would hope that your measurer is a sensible person whose only concern is that, when s/he signs your measurement forms, s/he is pleased not only to have a boat that measures within the rules, but that s/he has added another happy owner to the IOM community! I would hope you'd be helped to do whatever it takes to allow the boat to meet the rules.

Likewise if I find that my scales at home are over reading, can I add weight to bring it up to 4kg there and then?

As above. The only little issue here is that your corrector weight(s) need to be "fixed" inside the hull...

Now there is an issue here which is important. The two rules you refer to (draught and weight limits) are in Section C of the Class Rules. This is what the Class Rules have to say about Section C:

IOM CR 2003 v2 wrote:The crew and the boat shall comply with the rules in Part II when racing. Measurement to check conformity with rules of Section C is not part of fundamental measurement.

So, it turns out that there is no place on the measurement form to note or record that your boats meets the draught limit, or the weight limit. And, there is no call for your measurer to measure these things as part of fundamental measurement... But again, being sensible, I'm sure that your measurer will agree to check these measurements so you can be comfortable about going on to race a legal boat, and this is indeed an MYA recommendation (but not a requirement).

Also I have a bung that sticks out of the transom (about 5mm, but over the 1000mm loa) just for drainage when I'm club sailing....my intention is to just cover this with tape when it's measured...is there any thing against doing this?

LOA is part of fundmental measurement. No problem presenting your boat with the hole covered with some tape for measurement. No problem racing with it covered with some tape when competing in an event being run according to (all) the rules. What you do otherwise is entirely up to you.

Hope this helps!

Graham_Snook · Post by **Graham_Snook** » 30 Aug 2006, 11:43

Hi Lester,

Many thanks for your clarification. Just got to find the time now...Arggg

MCooper · Post by **MCooper** » 30 Aug 2006, 15:22

Graham.

Just had to say, first welcome to the IOM Class and second that I like your photography. Excellent work!

Marko Majic · Post by **Marko Majic** » 30 Aug 2006, 17:15

Hi Lester,

Thoughtful and sensible reply - and I'm pleased to say that most measurers I've encounted tend to follow the approach you've outlined and help guide the process along and make it easy on the owner (where possible). I, also, try to take this approach when called to measure a boat...

Most of the time the above entails giving the owner a magic marker and asking him/her to scribble boat registration numbers somewhere on the hull or giving him/her a little round sticker to place as a deck limit mark.

The only disagreement I have with your reply is:

Lester wrote: LOA is part of fundmental measurement. No problem presenting your boat with the hole covered with some tape for measurement. No problem racing with it covered with some tape when competing in an event being run according to (all) the rules. What you do otherwise is entirely up to you.

Hope this helps!

Which I'm not sure is correct! Clearly, LOA measurement is not one of the questions on the measurement form and although the measurement form clearly states that: "The boat shall comply with all the class rules in Sections D, E, F, G and H even if some of the rules are not
mentioned on the measurement form(s)." - LOA measurement is in section C (C.4.1) and therefore clearly is a part of the event measurement.

Having said that, a bung on the transom would (IMHO) fall afoul of D.2.3(c) which IS a part of the fundamental measurement (by virtue of being in Section D as well as explicitly as Question #15 on the MF).

Graham - if I could offer a bit of advice here: while you can certainly use the bung while sailing "recreationally" and replace it with a piece of tape while competing (as Lester suggests) - I would recommend you just close up that hole and drill another one! A hole in the deck shell facing up just off the transom or one at the very front of the bow (although, since that part of the boat is often submerged

if you do it there you should insure a good, tight fit with your bung) - works just as well... Taking tape on and off during the event to drain (with the wet hull - and even if the hull is dry the area around the hole will be wet after draining) is a real pain...

Cheers,

Marko

Lester · Post by **Lester** » 30 Aug 2006, 17:20

Marko wrote:The only disagreement I have with your reply is:

Lester wrote: LOA is part of fundmental measurement [...]
Which I'm not sure is correct!

Hi Marko

Well spotted! Yes, I got that wrong, LOA is in section C! As you say, the issue is a different one, of a fitting projecting beyond the hull.

Graham_Snook · Post by **Graham_Snook** » 30 Aug 2006, 17:25

Hi Mark,

Thanks for that, only problem is that it's my photography that's stopping sorting my IOM out, as I never know where I'll be and when

Graham_Snook · Post by **Graham_Snook** » 30 Aug 2006, 18:39

Hi Marko,

Thanks for the advise about the bung...Luckily the only time my boat has seriously taken on water was when she pitchpolled, in strong winds with my stubby keel (we run low on water as well...I dunno no water, no measurer at least we still have boats

) anyway she stayed nose down till she rolled over and one of the seals on my patches came loose, but I'm all dacron'd up now so it hasn't been a problem again

To be honest she doesn't really take on much water and I can go the whole morning 11-3pm without having to drain, and when I do there's less than a small single measure

...obviously in really heavy weather things are different, but I've only got one rig so if it's too rough I don't sail.

I think I'll get her measured and then think about the bung arrangement, rather than drilling hols and remembering that the structure is under there

Thanks again

G

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Measurement process

Measurement process

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Thanx Mark

Marko