8S6 
FOREST AND STREAM, 
fNov. 1, 1962. 
B. B. Crowniilshield, Boston, Mass. ; Clinton H. Crane, 
New York, N. Y. ; George L. Watson, Glasgow, Scotland; 
William Fife, Glasgow, Scotland; Arthur E. Payne, 
Southampton, England ; Arthur Milne. Glasgow, Scot- 
land ; Linton Hope, London, England ; J. N. Soper, Lon- 
don, England; R. E. Fronde, Gosport, England; J. T. 
Bucknall, Bitterne, England; Alfred Benzon, Copenhagen, 
Denmark, and Charles H. Dtiggan, Montreal, Canada, few 
thinking men will away themselves aga'nst such a formid- 
able list. The men who made up the committee, are all 
men of prominence who have devoted their lives to the 
development of yachting — men of great practical experi- 
ence, fully qualified to pass upon the needs of the sport. 
The report of the Committee on Measurement follows : 
Rating Measurement. 
Rating Measurement = 
L V S A 
5 V D 
( Length multiplied by 
I square root of sail 
-] area, divided by 5 
I times cube root of 
displacement. 
beam at load waterline (b), and divide by eight 
LENGTH. 
L, — Length to be obtained as follows : 
To extreme beam (B), wherever found, add greatest 
lay off line parallel to and this distance from middle line 
of hull on deck and take extreme length of hull measured 
on this line; to this add length of load waterline on 
vertical projection of this line to waterline plane and 
divide the sum of these lengths so obtained by two, which 
will give L in the formula. 
SAIL AREA. 
S. A. — Sail area to be obtained as follows and the square 
root of this area to be the VS A in formula: 
MAINSAIL. 
A. Measured from the top of .the boom (vmder the pin 
for outhaul shackle on traveler, or clew slide, when 
hauled chock out) to the gaf¥ under the pin of the 
sheave of the topsail sheet, provided the peak cringle of 
the mainsail does not extend beyond the pin: in the case 
of the yacht having no topsail, or of the peak cringle ex- 
tending beyond the pin of the topsail sheet sheave, then 
the measurement to be taken to the peak lacing hole. 
B. Perpendicular to A, measured to underside of gaff 
close in to thcfnast. 
C. Measured from top of boom over the pin of the 
sheave or outhaul or end of clew slide to underside of 
gaff close in to the mast. 
D. Perpendicular to C, measured in to the mast, in a 
line with the top of the boom, or to tack cringle of main- 
sail, if below top of boom. 
YARD TOPSAIL. 
E. Measured from upper side of gaff close in to the 
mast to pin of sheave for topsail sheet, or to lacing-hole 
in jackyard. 
F. Perpendicular to E, measured to lacing-hole in yard. 
G. From lacing-hole to lacing-hole in yard. 
H. Perpendicular to G, measured to pin of sheave for 
topsail sheet in gaff; or to lacing-hole in jackyard. 
JIB HEADER. 
K. Measured from top of gaff close in to mast to pin 
of halyard sheave in topmast. 
L. Perpendicular to K, measured to pin of top.sail 
sheet sheave in gaff ; or to lacing hole in jackyard. 
LUGSAIL. 
To be measured as mainsail, except as follows : 
A. Upper end measured to peak lacing-hole in yard. 
B. and' C. Forward end measured to lower lacing-hole 
in yard. 
D. Lower end measured to tack cringle of mainsail, if 
below top of boom, or forward of mast. 
HEADSAXLS. 
L The perpendicular I to be measured from the deck 
at the foreside of the mast to where the line of the luff 
of the foremost headsail, or of the spinnaker halyard, as 
the case may be, when extended, cuts such perpendicular. 
In the case of a schooner the perpendicular I shall be 
measured upon the foremast, unless she has a main spin- 
naker the height of which exceeds the perpendicular upon 
the foremast, in M'hich case the excess shall be added to 
the perpendicular L 
J. The base J to bfe measured from the foreside of the 
m.ast to where the hne of the luff of the foremost headsail 
when extended cuts the bowsprit, other spar, hull, etc., 
as the case may be. In all cases, if the distance from the 
center fore and aft line of the mast to the outer end of 
the spinnaker boom exceeds the distance from the fore- 
side of the mast to the bowsprit end (where cut by the 
line of the luff of the foremost headsail), the excess shall 
be added to the base of the fore triangle. In the case of 
a schooner, the base J shall be measured from the fore- 
mast, but if the main or longest spinnaker boom exceeds 
the before mentioned distance, the excess shall be added 
to the base J. 
In the case of a yacht having no headsa'l, but carrying 
a spinnaker, the area for headsail shall be computed from 
the length of spinnaker boom, and the height from deck 
to where the line of the halyard of the spinnaker when 
extended cuts the mast. 
A spinnaker may have a headstick or board not longef 
than one-twentieth the length of the spinnaker boom, but 
not a foot yard, or more than one sheet, or any other 
contrivance for extending the sail to other than a tri- 
angular shape. 
In the case of a yacht carrying a square sail, or square 
topsa.l, or raffee (together or separately), the actual area 
of the same shall be computed ; and if such area exceed 
the area of the fore triangle, the excess shall be used in 
the total area for determining the rating. 
FORESAIL OF SCHOONERS. 
To be measured as mainsail, except that the lower end 
of A is to be taken at foreside of mainmast, in a line with 
-main boom gooseneck. 
Directions fcf Measotirg Sails. 
The measurer shall take measurements I and J for fore- 
triangle, G and E for yard topsail, and the length of spni- 
naker boom. If the other measurements are supplied by 
Name. Qass. i-i 
Columbia ". 89.76 
Deteiider 88 85 
Mineola .' .' .100 'rV M. 7o!25 
Yankee 70.25 
Kainbow 70 25 
Yii'&inia 70 .'25 
Weetamoe , 80 R. M. 51.00 
Neola 51.00 
Altair 64 R. M. 45.00 
Pluiiima 45 00 
Shark 45^00 
Isolde .51). 7 
Wasp iBM 
Gloriana 45.5 
Syce 45; 
Petrel 56 
Effoft .51 R. M. ,%.'6 
Dor\vina 35.0 
Challenge ;^5.o 
Rosalie 41 .0 
Cartoon 25.0 
*Countess 40 R. M. ,'32.0 
Leda 32.0 
*Now Spasm. 
Meteor 120. 
Lasca 100 R. M. 89. S 
Emerald 85.9 
Corona 85.5 
Iroquois .' 79.0 
Amorita 80 R. M. 09. 
Elmina 68. 
Muriel *. 68. 
Ouissetta 66. 
Katrina 69.5 
4:5 principal. Each limit four-fifths of limit 
di 
85.9 
82.8 
70.03 
70.03 
70.03 
70.0.3 
56.00 
56.00 
48.9 
48,9 
48.9 
55.1 
46.25 
44. 
42.7 
51.7 
39.6 
37.8 
35.9 
41.9 
33.0 
34.35 
34.35 
SLOOP.S. 
Pi 
(4 
> 
121.00 
117.00 
88.7 
88.7 
88.7 
88.7 
72.08 
72.08 
62.7 
62.7 
62.7 
64. 
67.5 
67.2 
61.2 
58.7 
.51. 
,52.5 
52.5 
53.0 
35.0 
42.9 
42.9 
102.00 
100.00 
76.34 
76.34 
76.34 
76.34 
60.00 
60.00 
,51.58 
51.58 
51.58 
60.5 
54.97 
.54.17 
.51. 
57.82 
43.00 
43.00 
43.00 
45.7 
.30.0 
35.85 
35.85 
SCHOONERS. 
103.9 
74.2 
77.0 
79.2 
64.2 
64. 
64. 
64. 
61.7 
63. 
111.00 
102. 
101.2 
105.0 
86.4 
84.5 
84.5 
84.5 
83.0 
80.0 
112.4 
93.3 
90.7 
93.13 
82.3 
73.2 
73.2 
73.2 
73.3 
73.14 
>> 
1-1 
121.00 
113.00 
80.7 
90.7 
90.7 
90.7 
73.00 
73.00 
62.6 
62.6 
62.6 
61. 
59. 
55.6 
55.2 
55. 
50.0 
49.5 
47.0 
49.0 
47.6 
39.0 
39.0 
110.5 
94.8 
92.0 
98.0 
82.6 
77.0 
77.0 
77.0 
80.0 
68.5 
01 
> 
CO 
r-i yA 
116. 
112.00 
91.8 
91.8 
91.8 
91.8 
75.00 
75.00 
66.00 
66.00 
66.00 
74.6 
62.5 
.59.4 
57.6 
69.8 
53.5 
51.2 
48.5 
55.6 
44.6 
46.37 
46.37 
139.00 
102. 
104.0 
107.0 
86.7 
86.4 
86.4 
86.4 
83.6 
85.0 
w 
5.00 
5.00 
5.0 
7.8 
3.6 
1.3 
4.0 
O 
19.00 
19.00 
14.6 
14.6 
14.6 
14.6 
11.6 
11.6 
10.3 
10.3 
10.3 
11.6 
11. 
11. 
10.3 
9. 
9. 
9. 
9. 
10.8 
14.0 
14.5 
12.6 
12.3 
12.0 
12.0 
11.8 
1-1 Q 
18.00 
18.00 
14.6 
14.6 
14.6 
14.6 
12.00 
12.00 
10.5 
10.5 
10.5 
11.6 
11. 
11. 
10.6 
10. 
9. 
9. 
9. 
9. 
9. 
1-1 CD 
5.00 
5.00 
14.6 
14.7 
ii.'o' 
12.0 
12.0 
12.0 
12.0 
50 
B 
D 
bog 
•ri « 
131.00 
123.00 
90.7 
90.7 
90.7 
90.7 
73.00 
73.00 
62.6 
62.6 
62.6 
61. 
64.0 
63.4 
58.8 
55.0 
50.0 
50.8 
51.0 
49.0 
47.6 
39.0 
39.0 
110.5 
94.8 
92.0 
98.0 
82.6 
78.5 
77.00 
77.00 
80.00 
68.50 
CLASSIFICATION, 
of class above, approximately, with regularly increasing intervals. 
100 
20 
80 ■ 4 
64- 
-16 
51- 
40- 
_10 
±0 
-11 
-10 
30 
The figures in the aliove tables are approximate measurements furnished by designers. 
the sailmaker, the measurer shall check them by measur- 
ing the following : 
Boom, from lower end of A to lower end of D. 
Gaff, or lugvard, from upper end of A to forward end 
of B. 
Jackyard topsail, sheet to outer lacing-hole. 
In cases where it is necessary for the official measurer 
to measure the sails, he shall do so in the following man- 
ner: Take the length of boom from mast to pin of 
sheave for outhaul, and length of gaff from mast to pin 
of topsail sheet sheave or lacing-hole as the case may re- 
quire; then hoist the sail with the tack fast and set the 
peak and luff up taut, and let go the topping lifts so that 
the weight of the boom comes on the leach of the sail. 
With a line and tape, measure the leach and luff and the 
diagonal C. For the headsail measure the height I, and 
the distance J, as provided for in the section dealing with 
headsail. For topsail the sail should be hoisted and 
marked in a line with the gaff ; then lowered and the 
other dimensions taken. From the measurements so 
taken a sail plan should be made and the other above- 
specified measurements obtained therefrom. 
CiIcuIatioQ of Sail Areas. 
MAINSAIL. 
Multiply A by B and C by D, and add the two products 
together and divide by 2. 
YARD TOPSAIL. 
Multiply E by F and G by H, and add the two products 
together and divide by 2. 
JIB HEADER. 
Multiply K by L and divide by 2. 
HEADSAILS. 
Multiply I by J and divide by 2. 
LUGS AILS AND HEADSAILS. - 
No deduction is to be made from headsail area on the 
score of any portion of the lugsail area ahead of the mast. 
SAILS BOUNDED BY CURVED EDGES. 
Any increase in the area of sails due to curved edges, 
extended by battens or otherwise beyond the line between 
the points for measurement, shall be computed as fohows : 
Multiply the base E by two-thirds of the perpendicular P. 
DISPLACEMENT. 
D. — ^Displacement to be obtained as follows : 
At points dividing the length of the load waterline 
into five equal parts, find areas of immersed cross-sec- 
tions in square feet ; from the areas in square feet ob- 
tained and load waterline length, find approximate dis- 
placement in cubic feet, which will be the D in formula. 
Limit L. L. 
Should the L.W.L. of any yacht in racing trim exceed 
'M 
HAUOLI. 
Designed by Henry J. Gielow for F. M. Smith, 1902. 
