New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1906-02-11
NEW RULES OF RATING
Exhaustive Report of atlantic Coast
Yachting Conference.

The report OF the committee appoin+ed nv the At
lafnc Coast conference to revise the old rules OF
rating, time allowance and measurement and to
formulate new ones for uniform use by the prin-
cipal clubs OF the United States was formally
adopted last week. The report which shows a
most thorough and impartial investigation of all the
points at issue follows:
ited amount os material was available consisting
emery OF the report OF the regatta committee of
the results OK the races of the Larchmont Man
- 70 6 $3.50, 30 tit Nortnp0r' aeht CLUBS
- 70 De IesIetteu tIil We We're unable TO get the
Yacht Racing Association OF Gravesend Bay the
Eastern Yacht Club and the clubs on Massac husetts
Bay In all. the results OF some thirty-four race
days. including upward OF $50 finishes, were ex-
aminec. Some material discarded at the outset
as being worthless, either on account OF the extreme
81 s1fcis1t &C.. h,; % 80 t5 1,ofariai IL
o. sgllCleit uaIa; put such discarded natertaI -
noted or the diagrams. In the preparation OF this
After considerable deliberation II was deemed ad-
ylsa3Sle TO use graphic method OF presenting the
stood Exactiess is from the nature Of The prob
lem. an absolute impossibity. The best that can
be hoped Tor is an approximation Of the average
arrived at by, graphic methods. The method pur.
sued consisted OF, first the drawing of a curve OF
IN the standard tables and also curve of the full
OF the data and drawing curves third. comparison
OF the curves so drawn with one another, and
hn 4b the deduction t Of conclusions ,.so1
the assumption tbat snee5 nf a We'll formed Vessel
line length in feet, what has been commonly
cepted as the same thing. the square root OF the
rating measurement. These speeds in knots an hour
converted INTO seconds knot give a curve whose
equation is Y (3600+vXi, in which is the num-
Der OF seconds that II takes vessel OF
shown By heavy black lines. II IS obvious
that the difference in length between the two
ord.nates of the curve is the difference in Sec
onda that the two corresponding vessels take to go
one nautical mile. and IL therefore the number OF
seconds for such distance that the larger vessel
should allow the smaller in order that she should
nave no advantage due solely TO her size In prac-
tee this allowance would seldom be correct be-
cause there are several modifying factors. Yachts
seldom get the opportunity to show their full speed
IN race. and the actual distance sailed Is guam
tity which Is independent of the stated length OF
the course. To cover these uncertainties the pres
ent time allowance tables have been calculated at
various percentages different times the present
tables being calculated at 70 per cent of the full
theoretical allowance.
In constructing the time allowance tables vessel
OF loo rating was taken the standard. The time
mile corresponding this rating 1888 seconds
base, the ordinates measured from the broken
heavy black lines will represent the full 100 per
allowance that vessels Of a corresponding rating
should receive from. vessel OF 40 seconds rating
measurement, and 20 per cent of those ordinates win
represent the allowance forth in the standard
tables. The fun heavy black line in the diagrams
represents this 20 per cent curve. Taking as the
ordinate Of this the 1888 base, have for
the equation OF the curve:
VI U-2g3 %
= g, 60O-2939)
v