rating systems

Imported from Yahoo
1

Does anybody know the formula for corrected time for these rating systems:-

MORC
MOCRA
LYA
ORC

Google just confused the heck out of me...

Regards,
Colin J
www.match-it.com

···

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.496 / Virus Database: 295 - Release Date: 03/07/2003

[Non-text portions of this message have been removed]

2

Colin,

The ORC rating is described fully on the ORC's website. The
rulebook is available at http://www.orc.org/orc_club/clubook.pdf.

They offer three basic scoring options on both the IMS and ORC
rating certificate. The work exactly the same for ORC and IMS:
Performance Line Offshore
Time-on-Distance (GPH - General Performance Handicap)
Time-on-Time (ILC - International Level Class)

Performance Line Offshore is defined as:
Corrected Time = (PLT Offshore * Elapsed Time) - (PLD Offhsore *
Distance)
where PLT (Performance Line Time) Offshore and PLD (Performance Line
Distance) Offshore both come off the Simplified Scoring Systems
sections of the ORC/IMS certificate.

Time-on-Distance (GPH - General Performance Handicap) is defined as:
Corrected Time = Elapsed Time - (GPH Offshore * Distance)
where GPH (General Performance Handicap) Offshore comes off of the
Simplified Scoring Systems section of the ORC/IMS certificate.

Time-on-Time (ILC - International Level Class) is defined as:
Corrected Time = ILC Inshore * Elapsed Time
where ILC (International Level Class) Inshore comes off of the
Simplified Scoring Systems section of the ORC/IMS certificate.

And that is esentially it. For all the mystique surrounding ORC and
IMS, the simplified scoring methods are really quite simple. I
think all the 3 letter acronyms come from somebody programming it
all up in Fortan.

There are more complicated ways of scoring IMS and ORC but hardly
anyone uses them because they too complicated, mean you have to use
specialised software and are not transparent to the Race Officer.
We use them but, since IMS/ORC are in decline, will probably move to
the Simplified Scoring Methods above for these very reasons.
Especially if Colin puts them into Sailwave. We are moving to IRC
as a more accessible and popular system - also it's easier to
optimise keel boats to IRC.

To give you an example of this, here is an excerpt of this year's
Sydney to Hobart yacht race - have a vested interested as I'm a nav
on a boat in it:

"Results will be calculated using the Time-on-Time Simplified
Scoring Option, using the Offshore TMF (adjusted for any age
allowance) as a multiplier of elapsed time. The boat with the lowest
corrected time (after application of scoring penalties, if any)
will be scored first."

As always, the CYCA have decided to do their own thing. Instead of
using the Performance Line method recommended by the ORC (who
administer the IMS and ORC rules) for Offshore races, they are using
an even simpler method of:

Corected Time = 600/GPH * Elapsed Time

Although this is a standard method, it is really only there to
divide up a large fleet into divisions and shouldn't be used for
scoring.

I suspect the problem is with their software which can't handle
Performance Line Offshore scoring.

I've included an example of the Simplified Scoring System off of an
ORC certificate. This part of it is identical to an IMS certificate.

             T-on-D T-on-T Perf. Line
           (sec/mi) TMF PLT PLD
Offshore 588.9 (=GPH) 1.0188 (=600/GPH) 0.826 87.1 (Ocean)
Inshore 653.5 (=ILC) 1.0329 (=675/ILC) 1.001 272.4 (Olympic)

Performance Line Correct Time = (PLT * Elapsed Time) - (PLD *
Distance)

Hope this helps you.

Regards

Mike Gill
Ocean Racing Club of Victoria

Does anybody know the formula for corrected time for these rating

systems:-

···

--- In sailwave@yahoogroups.com, "Colin Jenkins" <colin@s...> wrote:

MORC
MOCRA
LYA
ORC

Google just confused the heck out of me...

Regards,
Colin J
www.match-it.com

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.496 / Virus Database: 295 - Release Date: 03/07/2003

[Non-text portions of this message have been removed]

3

Hi Mike,

...
> I've included an example of the Simplified Scoring System off of an
> ORC certificate. This part of it is identical to an IMS certificate.
>
> T-on-D T-on-T Perf. Line
> (sec/mi) TMF PLT PLD
> Offshore 588.9 (=GPH) 1.0188 (=600/GPH) 0.826 87.1 (Ocean)
> Inshore 653.5 (=ILC) 1.0329 (=675/ILC) 1.001 272.4 (Olympic)
>
> Performance Line Correct Time = (PLT * Elapsed Time) - (PLD *
> Distance)
>
> Hope this helps you.

Thanks Mike (again). Very clear. Many Sailwave users would like the
ability to swap rating systems within a series, apply it and
compare/contrast with other systems. I'm thinking of having a tab in the
competitor form where the values for *all* the rating systems Sailwave knows
about can be located. Obviously one could grab these values from the rating
files as well. I think this would be more user friendly than changing rat
sys and having to update the ratings all the time.

Regards,
Colin
www.sailwave.com

···

-----Original Message-----
From: Ocean Racing Club of Victoria Rudder Cup
[mailto:rudder_cup@orcv.org.au]
Sent: 07 July 2003 01:20
To: sailwave@yahoogroups.com
Subject: [sailwave] Re: rating systems

Colin,

The ORC rating is described fully on the ORC's website. The
rulebook is available at http://www.orc.org/orc_club/clubook.pdf.

They offer three basic scoring options on both the IMS and ORC
rating certificate. The work exactly the same for ORC and IMS:
Performance Line Offshore
Time-on-Distance (GPH - General Performance Handicap)
Time-on-Time (ILC - International Level Class)

Performance Line Offshore is defined as:
Corrected Time = (PLT Offshore * Elapsed Time) - (PLD Offhsore *
Distance)
where PLT (Performance Line Time) Offshore and PLD (Performance Line
Distance) Offshore both come off the Simplified Scoring Systems
sections of the ORC/IMS certificate.

Time-on-Distance (GPH - General Performance Handicap) is defined as:
Corrected Time = Elapsed Time - (GPH Offshore * Distance)
where GPH (General Performance Handicap) Offshore comes off of the
Simplified Scoring Systems section of the ORC/IMS certificate.

Time-on-Time (ILC - International Level Class) is defined as:
Corrected Time = ILC Inshore * Elapsed Time
where ILC (International Level Class) Inshore comes off of the
Simplified Scoring Systems section of the ORC/IMS certificate.

And that is esentially it. For all the mystique surrounding ORC and
IMS, the simplified scoring methods are really quite simple. I
think all the 3 letter acronyms come from somebody programming it
all up in Fortan.

There are more complicated ways of scoring IMS and ORC but hardly
anyone uses them because they too complicated, mean you have to use
specialised software and are not transparent to the Race Officer.
We use them but, since IMS/ORC are in decline, will probably move to
the Simplified Scoring Methods above for these very reasons.
Especially if Colin puts them into Sailwave. We are moving to IRC
as a more accessible and popular system - also it's easier to
optimise keel boats to IRC.

To give you an example of this, here is an excerpt of this year's
Sydney to Hobart yacht race - have a vested interested as I'm a nav
on a boat in it:

"Results will be calculated using the Time-on-Time Simplified
Scoring Option, using the Offshore TMF (adjusted for any age
allowance) as a multiplier of elapsed time. The boat with the lowest
corrected time (after application of scoring penalties, if any)
will be scored first."

As always, the CYCA have decided to do their own thing. Instead of
using the Performance Line method recommended by the ORC (who
administer the IMS and ORC rules) for Offshore races, they are using
an even simpler method of:

Corected Time = 600/GPH * Elapsed Time

Although this is a standard method, it is really only there to
divide up a large fleet into divisions and shouldn't be used for
scoring.

I suspect the problem is with their software which can't handle
Performance Line Offshore scoring.

I've included an example of the Simplified Scoring System off of an
ORC certificate. This part of it is identical to an IMS certificate.

             T-on-D T-on-T Perf. Line
           (sec/mi) TMF PLT PLD
Offshore 588.9 (=GPH) 1.0188 (=600/GPH) 0.826 87.1 (Ocean)
Inshore 653.5 (=ILC) 1.0329 (=675/ILC) 1.001 272.4 (Olympic)

Performance Line Correct Time = (PLT * Elapsed Time) - (PLD *
Distance)

Hope this helps you.

Regards

Mike Gill
Ocean Racing Club of Victoria

--- In sailwave@yahoogroups.com, "Colin Jenkins" <colin@s...> wrote:
> Does anybody know the formula for corrected time for these rating
systems:-
>
> MORC
> MOCRA
> LYA
> ORC
>
> Google just confused the heck out of me...
>
> Regards,
> Colin J
> www.match-it.com
>
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.496 / Virus Database: 295 - Release Date: 03/07/2003
>
>
>
> [Non-text portions of this message have been removed]

-!- Tired of Hotmail? Try http://www.fastmail.fm -!-
http://www.sailwave.com/

Convert to daily digest of emails send blank email to:
sailwave-digest@yahoogroups.com
To unsubscribe from this group, send an email to:
sailwave-unsubscribe@yahoogroups.com

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

---
Incoming mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.497 / Virus Database: 296 - Release Date: 04/07/2003

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.497 / Virus Database: 296 - Release Date: 04/07/2003

4

I like that idea.

Most of the keelboats round Australia will enter a race for multiple
ratings. For example, a boat on the Melbourne-Hobart can actually
race in all of PHD (Performance Handicap Division), AMS (Australian
Measurement System), IRC (International Rule Club or IR2000 Club as
they now like to call themselves), IMS (International Measurement
System) and THD (Two-Handed Division) and potentially win the lot.

It's a b*gger to score, though. Our handicapper has a permanent
helper who is a spreadsheet guru. On Sunday, we had the first race
in our Winter Series. I think we had about 50 boats starting but
there were over 90 individual rating entries through people entering
multiple divisions. This is down over previous years due to the
cost of acquiring and maintaining a rating.

You're idea would go a long way to helping us out scoring events
like this. I believe there are a lot of clubs in the States in the
same boat, as it were.

Mike Gill
Ocean Racing Club of Victoria

Thanks Mike (again). Very clear. Many Sailwave users would like

the

ability to swap rating systems within a series, apply it and
compare/contrast with other systems. I'm thinking of having a tab

in the

competitor form where the values for *all* the rating systems

Sailwave knows

about can be located. Obviously one could grab these values from

the rating

files as well. I think this would be more user friendly than

changing rat

···

--- In sailwave@yahoogroups.com, "Colin Jenkins" <colin@s...> wrote:

sys and having to update the ratings all the time.

5

Hi Mike,

Most of the keelboats round Australia will enter a race for multiple
ratings. For example, a boat on the Melbourne-Hobart can actually
race in all of PHD (Performance Handicap Division), AMS (Australian
Measurement System), IRC (International Rule Club or IR2000 Club as
they now like to call themselves), IMS (International Measurement
System) and THD (Two-Handed Division) and potentially win the lot.

Do you have the formulas for AMS and THD? If you have given them to me
already, my apologies; I'm forgetting stuff more frequently lately...

regards,
Colin
www.sailwave.com

···

-----Original Message-----
From: Ocean Racing Club of Victoria Rudder Cup
[mailto:rudder_cup@orcv.org.au]
Sent: 07 July 2003 10:28
To: sailwave@yahoogroups.com
Subject: [sailwave] Re: rating systems

I like that idea.

Most of the keelboats round Australia will enter a race for multiple
ratings. For example, a boat on the Melbourne-Hobart can actually
race in all of PHD (Performance Handicap Division), AMS (Australian
Measurement System), IRC (International Rule Club or IR2000 Club as
they now like to call themselves), IMS (International Measurement
System) and THD (Two-Handed Division) and potentially win the lot.

It's a b*gger to score, though. Our handicapper has a permanent
helper who is a spreadsheet guru. On Sunday, we had the first race
in our Winter Series. I think we had about 50 boats starting but
there were over 90 individual rating entries through people entering
multiple divisions. This is down over previous years due to the
cost of acquiring and maintaining a rating.

You're idea would go a long way to helping us out scoring events
like this. I believe there are a lot of clubs in the States in the
same boat, as it were.

Mike Gill
Ocean Racing Club of Victoria

--- In sailwave@yahoogroups.com, "Colin Jenkins" <colin@s...> wrote:
> Thanks Mike (again). Very clear. Many Sailwave users would like
the
> ability to swap rating systems within a series, apply it and
> compare/contrast with other systems. I'm thinking of having a tab
in the
> competitor form where the values for *all* the rating systems
Sailwave knows
> about can be located. Obviously one could grab these values from
the rating
> files as well. I think this would be more user friendly than
changing rat
> sys and having to update the ratings all the time.
>

-!- Tired of Hotmail? Try http://www.fastmail.fm -!-
http://www.sailwave.com/

Convert to daily digest of emails send blank email to:
sailwave-digest@yahoogroups.com
To unsubscribe from this group, send an email to:
sailwave-unsubscribe@yahoogroups.com

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

---
Incoming mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.497 / Virus Database: 296 - Release Date: 04/07/2003

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.497 / Virus Database: 296 - Release Date: 04/07/2003

6

Hi Mike,

Measurement System), IRC (International Rule Club or IR2000 Club as
they now like to call themselves), IMS (International Measurement
System) and THD (Two-Handed Division) and potentially win the lot.

So IR2000 is a more modern name than IRC. Is IRM an IR2000 thing as well?
IRM and ORC are the same in a scoring context but what's the difference in a
sailing context? Club/International...?

CJ

···

-----Original Message-----
From: Ocean Racing Club of Victoria Rudder Cup
[mailto:rudder_cup@orcv.org.au]
Sent: 07 July 2003 10:28
To: sailwave@yahoogroups.com
Subject: [sailwave] Re: rating systems

I like that idea.

Most of the keelboats round Australia will enter a race for multiple
ratings. For example, a boat on the Melbourne-Hobart can actually
race in all of PHD (Performance Handicap Division), AMS (Australian
Measurement System), IRC (International Rule Club or IR2000 Club as
they now like to call themselves), IMS (International Measurement
System) and THD (Two-Handed Division) and potentially win the lot.

It's a b*gger to score, though. Our handicapper has a permanent
helper who is a spreadsheet guru. On Sunday, we had the first race
in our Winter Series. I think we had about 50 boats starting but
there were over 90 individual rating entries through people entering
multiple divisions. This is down over previous years due to the
cost of acquiring and maintaining a rating.

You're idea would go a long way to helping us out scoring events
like this. I believe there are a lot of clubs in the States in the
same boat, as it were.

Mike Gill
Ocean Racing Club of Victoria

--- In sailwave@yahoogroups.com, "Colin Jenkins" <colin@s...> wrote:
> Thanks Mike (again). Very clear. Many Sailwave users would like
the
> ability to swap rating systems within a series, apply it and
> compare/contrast with other systems. I'm thinking of having a tab
in the
> competitor form where the values for *all* the rating systems
Sailwave knows
> about can be located. Obviously one could grab these values from
the rating
> files as well. I think this would be more user friendly than
changing rat
> sys and having to update the ratings all the time.
>

-!- Tired of Hotmail? Try http://www.fastmail.fm -!-
http://www.sailwave.com/

Convert to daily digest of emails send blank email to:
sailwave-digest@yahoogroups.com
To unsubscribe from this group, send an email to:
sailwave-unsubscribe@yahoogroups.com

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/

---
Incoming mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.497 / Virus Database: 296 - Release Date: 04/07/2003

---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.497 / Virus Database: 296 - Release Date: 04/07/2003

7

Colin,

AMS is really a time-on-time formala (ie c = e * r) so we have no
problems with that one. Their website is
http://www.amsyachts.org.au. The work that goes into the rating is
quite complex and involves lots of measurements but it is just a
single number.

THD is another time-on-time rating specific for the lunatics who go
across Bass Strait with a crew of two. Again no problems scoring
it. If you think they are nuts, take a look at the Melbourne Osaka
Two Handed Yacht Race at
http://www.osakacup.com/2003e/results/index.php. Of the 20 starters
on a race of 5,500 nm, there were 16 who finished. Remember, this
lot had a crew of two. Oh yes, two of the boats sank.

Barking if you ask me!

Regards

Mike Gill
Ocena Racing Club of Victoria

Do you have the formulas for AMS and THD? If you have given them

to me

already, my apologies; I'm forgetting stuff more frequently

lately...

···

--- In sailwave@yahoogroups.com, "Colin Jenkins" <colin@s...> wrote:

regards,
Colin
www.sailwave.com

8

It gets a bit confusing and I think there is a bit of a bun fight
going on for possession of the "grand prix" events.

IR2000 makes up IRC and IRM. It is administed by the RORC and the
French equivalent UNCL. Take a look at
http://rorcrating.com/info/jargon.htm for a may of moving round that
minefield. Click on the "What is IR2000" to get it explained.

IMS and ORC are totally different. They are administered by the
ORC. Their website is http:/www.orc.org/. If you have a degree, it
will be helpful for their stuff, preferably in fluid dynamics.

Basically, IRC and IRM are gradually displacing IMS and ORC. IMS
and IRM are targetted a the higher end, IRM moreso. Both are based
on wierd secret forumulas in secret velocity prediction programs.

IRC and ORC at targetted at club racers who can't afford all the
b*llocks. Still expensive though.

There are various areas that there are stongholds but that's the
picture.

Regards

Mike Gill
Ocean Racing Club of Victoria

Hi Mike,

So IR2000 is a more modern name than IRC. Is IRM an IR2000 thing

as well?

IRM and ORC are the same in a scoring context but what's the

difference in a

···

--- In sailwave@yahoogroups.com, "Colin Jenkins" <colin@s...> wrote:

sailing context? Club/International...?

CJ