Things You'll Need:
- Pencil
- T-square
- Measuring tape
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Step 1
Lay the board upside down on a flat surface. Draw a center line on the board from tip to tail. This is your "stringer line."
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Step 2
Use a T-square to draw a "cross line" four inches up from the tail. This is the marker for the back end of your fins.
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Step 3
Place the centerboard fin on the stringer line, with the back end lined up flush with your cross line. Be certain the fin is lined up evenly, and then make a small mark at the front of it on the stringer line. Remove the fin.
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Step 4
Measure 11 inches up the stringer line and draw another cross line.
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Step 5
Mark side fin placement the second cross line, six inches on either side of the stringer line. This marks the back of your side fins.
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Step 6
Line up the back of the side fins with each mark on the cross line. Get them to a perfect 90-degree angle.
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Step 7
Toe in each fin a half inch. Mark the front of the placement of the front of the fins and remove. You now have fin placement marks and are ready to permanently attach the fins.
