PROCEDURE FOR EQUALIZING BOAT WEIGHT FOR CLASS RACING
Install Hull Floatation Marks. Install contrasting 12mm x 75mm floatation marks on both sides of stem at
the bow, and on both sides of aft end of rudder (long axis of marks parallel to waterline). The bottom of
these marks shall be located as follows. Aft Floatation Mark: Locate aft hull point 170mm forward of
transom along centerline of hull bottom. With the rudder fitted in its normal position, the bottom of the
floatation mark shall be 60mm vertically below the aft hull point and shall be marked on both sides of the
rudder at its trailing edge. Forward Floatation Mark: The bottom of the floatation mark shall be 1,260mm
below the projection of the top of hull flange where it intersects the forward side of the stem head fitting
measured down and around the forward face of the stem.
A full diagram showing the placement of the float lines is available on the Class website
Measurement Afloat. Boat shall include only the equipment and other items specified in Paragraph C for its
initial measurement. With dry bilges, boat shall be trimmed level (floatation marks approximately
equidistant from the floatation plane) by temporarily relocating equipment aboard as necessary (except for
equipment that may not be moved, as noted). No further equipment or ballast need be placed aboard if both
the forward and aft floatation marks are touching (or are below) the surface of the water ("proper sink").
Equipment and other Items Required for Measurement Trim. All equipment and other items listed in
paragraph II of the J/105 Class Floatation Worksheet & Certificate, Exhibit 7.3B to the J/105 Class
Association Rules (the "Class Rules") are required to be on the boat. If any optional items are permanently
installed on the boat, such items may be on the boat for measurement trim, but must be listed in paragraph
III of the Floatation Worksheet & Certificate and may not be removed from the locations where they are
To achieve proper sink, all items referenced in this paragraph C may be located anywhere on the boat on a
temporary basis (except where a required location is noted herein or in paragraph II or III of the Floatation
Worksheet & Certificate); for racing, those items may be relocated from their temporary locations to any
other place on the boat except as prohibited in paragraph E.2 below.
Trim Equalization Procedure. If the boat cannot be trimmed to proper sink with only the equipment and
other items required in Paragraph C on board, the owner shall choose any combination of the following
options to correct the trim to achieve proper sink:
Any optional items or standard factory installations not required to be on board by the Class Rules, such as
dodger (in its standard location), cushions, or 2nd battery.
Optional sailing gear such as spare sheets, blocks, winch handles, a second anchor with attached chain
and/or rode, foul weather gear or other sailing related gear that is part of the yacht’s permanent inventory,
but not including daily provisions such as food, drink and personal crew bags.
Second (spare) class spinnaker.
Up to 20 gallons of water in the optional factory tank (in standard location).
Lead corrector weight permanently installed (bolted, glassed or glued) inside a locker, settee, cabinet or
space other than below or above the main cabin flooring or the flooring in the head compartment/changing
area. Notwithstanding the foregoing, no more than 180kg (400 lbs) of corrector weights and water in water
tanks (paragraph 4) shall be located between the forward bulkhead of the head compartment/changing area
and the forward face of the cockpit floor. If more than 180kg (400lbs) of weight is required to achieve
proper sink, such excess weight shall be in the form of lead corrector weights and 30% shall be located on
the forward face of the forward bulkhead of the head compartment/changing area (above the floor boards
under the V-berth and outboard of the opening to the storage under the V-berth), and 70% shall be located
aft of the forward face of the cockpit floor (but not inside the engine room).
To achieve proper sink, all items listed in subparagraphs 1, 2 and 3 of this paragraph D may be located
anywhere on the boat on a temporary basis (except where a required location is noted above or in