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Tratman & Lowther
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Class Measurement and Racing Rules for Embassy Sailing Dinghy

1. Introduction.

The Embassy Dinghy is a restricted Class designed by R. Reynolds and produced by Tratman and Lowther Ltd, of Bristol. The object of the design was to allow boats to race together and compete on equal terms with each other. So each boat should be within reasonable limits of any other in terms of hull shape, sail plan, weight etc.

Tolerances are allowed in the measurements to allow for slight errors in construction ageing, but not for intentional variation. Minor variations are allowed in the design and shape of the original fittings to enable each owner to try out his ideas, but not to an extent which will give him any specific performance advantages.

2. Construction.

The hard chine marine ply construction, which is available in kit and ready-to-sail form from the builders is standard to all boats and should any member build his own boat from scratch it must conform to these standards.

3. Rig.

The Gunter rig of the Embassy Dinghy is standard to all boats and no other rig can be entertained in Class racing.

4. Measurements, Hull and Sails Rule.

Feet and inches
Min Max
1. Length overall excluding rudder fittings including stemhead fitting or stemband 10’10"  11’1"
2. Beam measured inside boat at aft end of centre thwart height. 4’0" 4’1½"
3. Beam measured inside boat at aft end of transom buoyancy tank across top of tank. 3’0" 3’1"
4. Distance from aft side of transom to centre of main mast step hole. 90" 91½"
5. Distance from outside of transom to centre of forward mast step hole. 98" 100"
6. Overall measurement stemhead to aft end of skeg measured along the keelband. 140" 142½"
7. Width across transom at chine height not including chine rubbing strips. 31½" 32½"
8. Depth of centreboard below keelband when in lowered position. 20½" 21½"
9. Width of centreboard. Measured at 12" up from the bottom forward corner. 9¾" 10¼"
10. Thickness of centreboard. 5/8"
11. Depth of rudder protruding below skeg when in max lowered position. 10" 12"
12. Width of rudder blade. 8½" 9"
13. Thickness of rudder blade. ½"
14. Depth of skeg below transom. 2¾"
15. Outer gunwhales. No part of gunwhales may extrude beyond outer skin by more than ... 7/8"
16. Weight of hull including fixed fittings and centreboard but exluding spars, rudder, sails and rigging. 4.125
17. Length of mast including cap and heel. 124" 125"
18. Circumference of mast. 5 7/8"
19. Length of gaff including jaws. 122½" 124"
20. Circumference of gaff at gaff hoisting band. 5½" 
21. Measurement to lower edge of gaff head black band, measured from peak of gaff. 6"
22. Measurement from peak of gaff to centre of gaff hoisting band. 6’8" 6’9"
23. Length of boom. 85½" 86½"
24. Position of inner edge of black band on boom measured from aft face of mast. 84"
25. Position of kicking strap measured from aft face of mast to centre band. 21" 22"
26. Height of gooseneck above mast thwart. 23¾" 24½"
27. Genoa. Luff length taken to bearing surfaces of thimbles. 8’9"
28. Genoa. Diagonal taken from centre of clew eye to nearest part of luff. 5’4"
29. Genoa. Centre of clew thimble to outside edges of sail at clew. 1"
30. Genoa. Window must be fitted. Length 24". Width 6".
31. Mainsail headboard. 4"
32. Mainsail Top Batten. 42"
33. Mailsail Lower Battens 24"
34. Mainsail. Reach length from forward corner of headboard including luff rope to extreme edge of sail including footrope immediately below clew eye. 15’3"
35. Mainsail. Half height. Max width when forward corner of headboard is placed on the bottom forward corner of the track and sail is smoothed out, sail to be measured across the resulting fold including boltrope. 4’11" 
36. All sails to be white including spinnaker.
37. Class insignia to be placed approx 8" below full length top batten and the same distance in from the leech.
38. Sail Numbers to be red and shall be placed each side of centre batten.
39. Spinnaker. Luff length. 9’3"
40. Spinnaker. Foot length. 10’0"
41. Spinnaker. Insignia to be affixed to forward side in upright position.
42. Spinnaker pole. Overall length including fittings. 5’0"

Whilst it is the intention to allow owners to exercise their own choice of fittings etc, no attempt shall be made to depart from the design nor take advantage of allowed tolerances.

43. Hull to be painted Embassy Red on the outside. Inside colour optional.

The following fittings shall be optional :-

Toe-straps

Shroud plates

Rigging Bottle screws

Spinnaker Chute

Extension Tillers

Kicking strap

Spinnaker fittings

Jib jammers

Rowlock plates

5. Sailing requirements of the Association in Class Racing.

    1. Races are to be sailed in accordance with IYRU and RYA rules except where specifically exempted by the amendments posted by the race officer of the day. Any such amendmend will be signalled by Int. Code H.

    2. Boats must hold a valid insurance certificate and measurement warranty.

    3. Adequate personal buoyancy must be worn by all competitors. Wet suits are not regarded as                                                                                                        

    4. All boats must carry two fathoms (minimum) of painter (or towing line).

    5. Rescue boats have priority for the safety of all competitors and this Association cannot accept responsibility for any damage to boats or equipment which might result from their passage or manoeuvre.

    6. Class Flag. Embassy Pennant.

 

 

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