Class Rule Changes
International 470 Class Association
Effective date: 2022-02-01
Status: Approved

Amendment One
JIB HEAD ADJUSTMENT SYSTEM (C.10.5 & D.3.1)
Old:
C.10.5 JIB(a) USE...
(2) Only one stainless steel luff wire of diameter not less than 2.3mm shall be fitted inside the jib luffsleeve.
Amend to read:
C.10.5 JIB(a) USE...
(2) Only one stainless steel luff wire of diameter not less than 2.3mm and the optional jib headadjustment line shall be fitted inside the jib luff sleeve.
Amend to add new item:
D.3.1 (b)….
(21) Jib head adjustment system.

Amendment Two
CENTREBOARD PIVOT (IN ACCORDANCE WITH WS INTERPRETATION 12/07/2021) (D.4.4,E.3.2 & E.3.4)
Old:
D.4.4
CENTREBOARD PIVOT
The position of the centre of the centreboard pivot shall be measured as in Figure “Centreboard PivotPosition”. The distance of the centre of the centreboard pivot from the HDP shall be 2650mm ± 10mm
and its height above the prolongation of the hull at the centreplane shall be 102mm ± 10mm.
The pivot pin shall pass through the centreboard case sides and be in a fixed position.
Amend to read:
D.4.4 CENTREBOARD PIVOT
The position of the centre of the centreboard pivot shall be measured as in Figure “Centreboard PivotPosition”. The distance of the centre of the centreboard pivot from the HDP shall be 2650mm ± 10mm
and its height above the prolongation of the hull at the centreplane shall be 102mm ± 10mm.

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Class Rule Changes
International 470 Class Association
Effective date: 2022-02-01
Status: Approved

The pivot pin shall pass through the centreboard case sides and be in a fixed position. The center ofthe centreboard case side holes and the pivot pin axis must coincide and the maximum permitteddifference between the centreboard case holes and pivot pin diameters is 2 mm.
Old:
E.3.2

FITTINGS(2)OPTIONAL
A bushing round the pivot of the centreboard.

Amend to read:
E.3.2

FITTINGSOPTIONAL(2)
A bushing round the pivot of the centreboard. It must be either fixed to the centerboard so that
there is no relative movement between the two or, if circular in section, it should be concentric.
Amend to add:
E.3.4 CENTREBOARD MEASUREMENT DIAGRAMS
Insert at the end of the list the following:
minimummaximum
Difference between centreboard pivot pin diameterand centreboard pivot hole or bushing’s internal diameter .................. . .............1 mm

Amendment Three
ELECTRONIC COMPASS (C.5.1)
Old:
C.5.1 For Use(a)
OPTIONAL…
(2) Up to two compasses, which may include timing devices. If electronic, only compasses withheading, heading memory and timing functions are permitted.
Amend to read:
C.5.1 For Use(a)
OPTIONAL…
(2) Not more than 2 magnetic compasses having no electronics, or one electronic self-contained
compass using magnetic input from fluxgate sensors. If electronic, the compass may have only
heading and timing functions.
The display may show only the following:• heading (damping may be adjusted manually),• heading ± a tacking angle (which may be adjusted manually),• time,2

Class Rule Changes
International 470 Class Association
Effective date: 2022-02-01
Status: Approved• race timing information,• identification,• battery condition, system error, adjustment and calibration information.
Race timing information may be transmitted by sound. The electronic compass shall not deliver, store
or correlate information in any way except as described here.

Amendment Four
WIND SPEED LIMIT FOR AMENDED RR42 (C.1.1)
Old:
C.1.1 RULES(a)
The following RRS 2017-2020 rules shall apply as amended below:(1)
If the average wind speed is clearly over 8 knots across the course the race committee
may signal in accordance with RRS Appendix P5 that pumping, rocking and ooching arepermitted. This changes rules RRS 42.2(a), RRS 42.2(b), RRS 42.2(c).
Amend to read:
C.1.1 RULES(a)
The following RRS rules shall apply as amended below:(1)
If the average wind speed is clearly over 10 knots across the course the race
committee may signal in accordance with RRS Appendix P5 that pumping, rocking andooching are permitted. This changes rules RRS 42.2(a), RRS 42.2(b), RRS 42.2(c).

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