North U Sail Trim Seminars

North U Sail Trim Webinars

ASA  &  North U  Join  Forces

to present a series of Sail Trim Webinars

Why North U?

North U has been the leader in performance sailing seminars since 1980. Their programs offer the latest in sailing techniques in an engaging interactive format that makes the course fun and effective. North U Seminars feature great instructors – expert sailors with years of teaching experience.

Why watch a Webinar?

Bicycles, bobsleds, sailboats. No matter what you race, you’ve got to be fast to win. If it’s sailboats you race, then the North U Trim Webinar is for you. North U Trim Webinars teach the latest in racing skills with an emphasis on practical, proven, real-world techniques that will help you win.

What Will I Learn?

The North U Sail Trim & Boat Speed Seminar covers sail trim on all points of sail. Upwind topics include jib trim, mainsail trim and helming. Downwind sections will cover symmetric and asymmetric spinnakers as well as tips for those who sail under jib and main only.

FULL Course Outline

Boat Speed & Sail Trim Webinar

Sailing UPWIND

Sailing efficiently upwind - against the force that drives us - is a marvel of modern design. The North U Trim Seminar provides fundamental understanding of the forces behind upwind sailing as well as nuances of trim to optimize upwind performance.

North U SimulatorNorth U Sail Trim Simulator

Upwind topics include mainsail and jib trim, helming, and a special Trim Solutions section to solve the most baffling problems in upwind performance. The Trim curriculum shows how angle of attack, depth, and twist combine to control upwind power, and how to change trim to improve performance. The interactive Sail Trim Simulator allows you to see how changes in sail controls change sail shape and performance, while video clips show real life trim and performance technique.


Sailing downwind is easy. Optmizing downwind performance is tricky. Downwind sections of the Trim Seminar cover both symmetric and asymmetric spinnakers and show how the coordinated efforts of the full team provide subtle but critical improvements in downwind performance.

Sailing DownwindSailing Downwind

You’ll learn how to control and optimize spinnaker shape with refinements that take you beyond the basics. You’ll also learn how to coordinate trim, helm, and crew weight to sail faster, deeper, and with more control.

We also cover differences in design and trim technique that distinguish symmetric and asymmetric trim. Plus we cover non- spinnaker trim for those who like to sail under Jib and Main only.

Fast Faster Fastest

The differences between good and great trim, between OK and fast boat speed, are small and nuanced. Kick your speed up a notch at the ASA / North U Sail Trim Seminar.


  • Race & Win
    • The Racing Pyramid
    • Performance Analysis
  • Upwind Sail Trim
    • Theory in Brief
    • Goal Oriented Trim
    • Angle of Attack, Depth, and Twist
  • Genoa Trim
    • Lead the Boat Upwind
    • Total Power Trim
    • Genoa Shape and Controls
    • Power, Angle of Attack, Depth, and Twist
    • Trim, Speed, Balance
    • Target Boat Speed
    • Matching Trim to Conditions
    • Coordinating Trim to the Helm
  • Mainsail Trim
    • Follow the Leader
    • Trim, Speed, Balance
    • Total Power Trim
    • Mainsail Shape and Controls
    • Power, Angle of Attack, Depth, and Twist
    • Target Boat Speed
    • Trimming to Point
    • Trim for Speed
    • Wave vs Smooth Water Trim
  • Helmsmanship
    • Target Boat Speed
    • Trim, Speed, Balance
    • Steer by the Telltales
    • Do NOT steer by the Telltales
    • Calling Trim from the Helm
  • Trim Solutions
    • Performance Problems/Trim Solutions
    • Pointing
    • Speed
    • Light Air
    • Heavy Air
    • Chop
    • Binary Power
  • Spinnaker Trim
    • Initial Spinnaker Trim
    • Reaching Trim
    • Running/VMG Trim
    • Light Air & Heavy Air Technique
    • Pole adjustment
    • Helming
  • Asymmetrical Spinnaker Trim
    • Initial Asymmetric Trim
    • Reaching Trim
    • Running/ VMG Trim
    • Light Air & Heavy Air Technique
    • Tackline Trim
    • Helming
  • Wing & Wing Trim
    • Pole Position and Air Flow
    • Sailing Angles
    • Leeward Pole Reaching
  • Conclusion
    • A Tactical Wizard

Inidividual Sessions

This course will be split into 3 separate episodes


Upwind Sail Trim

  • Theory in Brief
  • Sail Power
  • Angle of Attack, Depth, Twist
  • Total Power
  • Mix of Power
  • Sail Controls
  • Genoa Trim
  • Mainsail Trim
  • Trim, Speed, Balance
  • Performance Problems / Trim Solutions

Symmetric Spinnaker Trim

  • Initial Spinnaker Trim
  • Pole Height & Spinnaker Shape
  • Pole Position & Spinnaker Shape
  • Reaching Trim
  • Running Trim
  • Light Air Performance
  • Moderate Air Speed
  • Heavy Air Control
  • Puff Response

Asymmetric Spinnaker Trim

  • Asymmetric Design & Shape
  • Initial Asymmetric Trim
  • Tackline Settings
  • Reaching Trim
  • Running Trim
  • Puff Response
  • Driver / Trimmer – or is it Trimmer / Driver?
  • Planing!!!

Individual Sessions


per session

*Textbooks available separately

Register Now

Full Course Package


Complete North U Sail Trim Package!

*Textbooks available separately

Register Now

25% ASA Member Discount

ASA membership is about the future of sailing, access to the water, the environment and you! Enjoy special offers like 25% off the Complete North U Sail Trim Package and discounted prices on almost all ASA events and products. Not a member? Join here today!


Written by Bill Gladstone, the North U Sail Trim Book covers every facet of sail trim, boat speed, and boat handling. Sections on Trim Solutions solve the most baffling problems in performance, while the boat handling sections show how you can turn your crew into a cohesive team.

30-Day Access

Each webinar comes with 30-Day Access to review the content as you please! A link for this content will be provided after the end of the live event via email.