Follow along as John Pearce, US Sailing Youth Director, applies the Harken Blockheads tuning decal on a Club 420 to create fast, repeatable settings.

You can use the photos below to supplement the video:

 I. Jib Trim:

A. Tie a line to the jib tack pin.

B. Bring the line back through the fairlead and cleat-off as if it were a jib sheet. This will give you the theoretical tightest trim angle the jib would see.

C. On both sides of the boat, locate the point along your piece of line where the middle of the jib foot would be when trimmed. Place a strip of electrical tape on the deck, parallel and to the outside of the line. Using the tuning decal as a ruler, place it perpendicular to the tape so that the outside edge of the tape aligns with the number 1 mark on the decal. From here, place two more strips of electrical tape at the number 3 and number 5 marks, aligning the outside edges of each with the marks.

D. These three strips will help you to define baseline jib trim positions.

II. Outhaul:

A. Take the horizontal strip of the tuning decal and adhere it to the boom along the outhaul line just immediately aft of the outhaul cleat.

B. Adjust the outhaul to roughly half-way between the max ease and max trim you would see. Using a marker or piece of tape, mark the outhaul line at the tuning decal’s number 5 mark.  From here you can record settings as the outhaul is trimmed and eased, using the number 5 as your middle point.

III. Jib Halyard:

A. Using the vertical strip of the tuning decal, adhere it to the mast along the jib halyard purchase. When doing this, set the jib halyard tension to medium and then place the decal so that the number five is right next to the top of the block.

B. Using the top of the block as your marker, you can now record and repeat heavy and light jib halyard trim settings.

RECOMMENDED

Invaluable Advice, Video

Peter Burling on His Youth Years

The Blockheads team caught up with Olympic gold medalist, America’s Cup champion, and two-time World Sailor of the Year,

Repair, Video

Repairing Your Dinghy Centerboard

Learn the fundamentals of filling-in and patching-up damage to your dinghy’s centerboard. Finish the job in part two:

Repair, Video

Addressing Spider Cracks

Learn how to treat wear-induced spider cracks that appear along the hull of your dinghy. If not managed,

Repair, Video

Gel Coat Repair 101

Follow along and learn how to repair common types of damage to the gel coat layer on the


What exactly is a Blockhead? If you are totally obsessed with how to rig and sail your boat, you might already be one! Join the community of Blockheads to learn more about the sport, engage with others and share sailing experiences. This site serves as the hub for Blockheads globally, where you can discover how to join, media, tips and tricks, contests, and events. This program is all about YOU and we want to hear from everyone! Not seeing something? Your feedback is crucial, feel free to shoot us a comment or message.