Dabchick Class Association



Reprinted 1996

Name of Yacht : __________________________________________________________

Owner : __________________________________________________________

Address : __________________________________________________________


Owner's Club : __________________________________________________________

Name of Measurer : __________________________________________________________

Name of Builder : __________________________________________________________

Sail Number : __________________________________________________________

( The sail number will be allocated after the Measurer is satisfied that the hull conforms to the Class Rules - Section A of this schedule. )


Rule No:

1. The object of these rules is to establish a class of boat which is one- design in all matters which affect the basic speed. The rules shall be interpreted in this spirit. All boats shall be built to conform with the class rules.

2. Builders shall not attempt to get around the spirit or the letter of these rules. The rules are complementary to the measurement form. In the event of any discrepancy between the rules and the measurement form, the matter shall be referred to the DASA Technical Committee for a ruling. In addition any items found by the measurer to be not specifically sanctioned by these rules shall also be referred for a ruling.

3. It is the responsibility of the owner to see that the boat is properly measured and to see that it thereafter always remains in class even after alterations, additions or rebuilding have been carried out.

18. Hulls shall only be constructed of wood and/or glass reinforced plastic. No carbon fibre or kevlar materials may be used.

20. All hull measurements are exclusive of any rubbing strakes.

21. A general tolerance of +- 15 mm is allowed for all measurements unless otherwise stated.

This form when completed should be forwarded to:

The Dabchick Association of South Africa
c/o SAS
PO Box 5036


                                                        Rule   Should  Actual
                                                         No:   be mm:    mm:
Hull ( right way up ) 
Deck along centreline to be straight from bow           22(f)          Yes/No
        to transom. 
Length overall                                          22(a)   3 607 
Length from transom to centre of jib attachment           (b)   3 457 
Length                        of jib attachment   (max)   (c)      40
Length from transom to centre of mast step                (d)   2 697
Length                        of mast step        (max)   (e)     150
Length from transom to forward end of centreboard case  24(b)   2 210
Length from transom to aft     end of centreboard case  24(a)   1 651
Width  of centreboard case                        (max) 25         26
Depth  of hull at middle of centreboard case            27        267
Beam            at transom                              23(a)     641
Beam    710mm from transom                                (b)     895
Beam   1625mm from transom                                (c)   1 100
Beam   2235mm from transom                                (d)   1 150
Beam   2850mm from transom                                (e)   1 073
Beam   3300mm from transom                                (f)      915
Perimeter along outer edge of deck from centre line 
to a point 3300mm from transom of one half of bow (max) 26(a)     635
Vertical height of bow measured on centreline     (max) 26(b)      50
Rubbing strake if fitted vertical and horizontal  (max) 28      15x30
A single track adjustable fairlead may be               48             Yes/No
fitted on the port and starboard deck. 
Hull  ( upside down )
At transom:                                             29
  Depth of transom centre (excl skeg)                     (a)     114
  Depth of transom sides                                  (b)      64
  Skeg, if fitted, length, depth below keel       (max)   (c)  300x30
At   710mm from transom:                                30
   Depth from keel to gunwale                                      184
   Depth from keel to chine                                         95
At 1 625mm from transom:                                30
   Depth from keel to gunwale                                      235
   Depth from keel to chine                                        133
At 2 235mm from transom:                                30
   Depth from keel to gunwale                                      242 
   Depth from keel to chine                                        140
At 2 850mm from transom:                                30
   Depth from keel to gunwale                                      203
   Depth from keel to chine                                        114
At 3 300mm from transom:                                30
   Depth from keel to gunwale                                      118
   Depth from keel to chine                                         73
In the case of the deck or hull planking being chamfered the measurement shall be
taken to be that which would have been measured had no chamfering taken place.


Rule Should Actual No: be mm: mm: Hull Mass With permanently attached fittings, toestraps and hatchcovers in place but excluding cordage. (min) 31 38,6Kg If under mass, corrector masses must be fixed adjacent to mast step above or below deck. Corrector masses if fitted (max) 32 5,0Kg Total Mass in Kg. (min) 38,6Kg Numbers The boat's official number shall be permanently carved into the transom. The figures shall be not less than 20mm in height, and shall be clearly legible. 9 Yes/No Transom Holes Max number 2 (max) 42 2 Max diameter 30 (max) 42 30 Fittings All fittings shall be attached to the external surfaces of hull and not recessed in any way except : 1. Chain plates wholly within 10mm from external side of hull. 43(b) Yes/No 2. Forestay fittings may pass through deck Buoyancy (a) Hatches if fitted shall be of a threaded type and the hull shall remain watertight under sailing conditions. Is this so? 44(a) Yes/No (b) Boats constructed of glass reinforced plastic shall have the same positive buoyancy as that of a wooden boat. Is this so? 44(b) Yes/No Shall float and be rectangular in shape, 33 Yes/No except that corners may be rounded. Width (max) 33(a) 279

Minimum thickness 100mm from any edge (min) (b) 16 Perpendicular depth below keel when fully lowered (max) (c) 647 The daggerboard must be attached to the hull by a lanyard. Is it? (d) Yes/No Rudder Minimum thickness below waterline 50mm from any edge Aluminium 35 3 Wood 35 9 Width (max) 36(b) 203 Maximum length below transom (max) (a) 410 The rudder and tiller shall be fitted so that they shall not fall off in the event of a capsize. Are they so fitted? 37 Yes/No Spars Permanently bent spars are prohibited. Spars are straight? 38(c) Yes/No Must pass through a tube 78mm diameter x 300mm long, excluding fittings. 39 Yes/No (riveted track not exceeding 25mm high is a fitting) Coloured bands minimum 15mm wide in a contrasting colour to the spars must be painted as follows : Mast: From deck to top edge of lower band perpendicular to deck centre line (max) 40(a) 762 From top edge lower band to lower edge upper band (max) 40(a) 3 480 Boom: From after face of mast, excluding track to leading edge of band (max) 40(b) 2 159 Sails Shall be made of woven cloth 45(a) Yes/No Cloth reinforcements and tabling shall conform to latest IYRU measurement instruction limits. Mainsail Width of headboard, excluding boltrope measured square to the mast (max) 45(b) 115 Half height width folded, excluding boltrope (max) 46(a) 1 485 Leach (max) 46(b) 3 810 Battens, 3 in number, approximately equally spaced along the leach - length (max) 46(c) 610 Dabchick insignia and number shall be clearly visible, legible, of a single colour which strongly contrasts with the sail, and shall correspond to the registered 46(d) number as carved in the transom - size (min) 200x140x30 Yes/no No window is allowed Note Jib Luff (max) 47(a) 2 667 Leach (max) (a) 2 667 Foot (max) (b) 1 473 Centre measurement from highest point on luff to mid point of foot (max) (c) 2 720 Optional window is allowed. Size in sq. cm. (max) (d) 1 500 No battens or headboard allowed. Note

I, the undersigned, declare that I have carefully examined the construction of this boat and in my opinion it has been built in accordance with the Dabchick class rules and the provisions of this measurement schedule.




DATE: _________________ __________________________________________ Signed - SAS Appointed Dabchick Measurer