Sail Trim & Boat Speed

If you are looking to improve your sail trim and sail faster then the American Sailing Performance Racing Seminars powered by North U are for you. Taking place all across North America, these in-person seminars involve a full day of classroom-based instruction. The interactive presentations are taught by experienced North U sailing coaches.
SAT • APR 06, 2024
149USD / person
Full Day Seminar
Upwind Trim
Symmetric Spinnaker Trim
Asymmetric Spinnaker Trim
Jib & Main Reaching/Running
North U Sail Trim Simulator
Live Q&A
Money Back Guarantee*
“I had the privilege of attending a sail trim seminar and wanted to express my gratitude for such a great program. The information, the instructor, and the materials were first-rate, and our boat will be faster this year because of it.” ~ Doug N. from Bellingham WA
“The instructors grasp of the material and informal manner put the class at ease and allowed for great interaction. Tremendous knowledge and entertaining too!“ ~ J Franklin



Why Attend A Seminar?

In-person seminars offer personal interaction with instructors. You can ask questions, seek clarifications, and get feedback tailored to your needs and skill level. Seminars also provide an opportunity to engage with the sailing community and make connections with other local sailors.

What Will I Learn?

This Sail Trim & Boat Speed seminar covers sail trim on all points of sail. Upwind topics include jib trim, mainsail trim, and helming. Downwind courses cover symmetric and asymmetric spinnakers as well as tips for those who sail under jib and main only. See below for more information.

Who Should Take This Seminar?

This seminar is geared toward sailors of all levels. It teaches you how to improve your sail trim so that you can sail faster. You can use your newfound speed to beat a fleet of one-design boats to the finish line or simply to reach your cruising destination faster.

Powered by North U

North U has been the leader in performance sailing courses 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.


Sailing efficiently upwind - against the force that drives us - is a marvel of modern design. This seminar provides you with a fundamental understanding of the forces behind upwind sailing as well as nuances of trim to optimize upwind performance.

Upwind topics include mainsail and jib trim, helming, and a special "Trim Solutions" section to solve the most baffling problems in upwind performance. The 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 techniques.


Sailing Downwind

Sailing downwind is easy. Optimizing downwind performance is tricky. The downwind sail trim courses cover both symmetric and asymmetric spinnakers and show how the coordinated efforts of the full team provide subtle but critical improvements in downwind performance.

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 techniques that distinguish symmetric and asymmetric trim. Plus we cover non-spinnaker trim for those who like to sail under jib and main only.



  • The Racing Pyramid
  • Performance Analysis
Upwind Sail Trim
  • Theory in Brief
  • Goal Oriented Trim
  • Genoa Trim
  • Mainsail Trim
  • Helmsmanship
  • Target Boat speed
  • Total Power Trim
  • Trim, Speed, Balance
  • Trim Solutions
Symmetric Spinnaker Trim
  • Initial Spinnaker Trim
  • Reaching Trim
  • Running Trim
  • Light Air Performance
  • Heavy Air Control
  • Pole Height & Spinnaker Shape
Asymmetric Spinnaker Trim
  • Initial Asymmetric Trim
  • Reaching Trim
  • Running Trim
  • Tackline Settings
Jib and Main Trim
  • Jib Reaching
  • Running Trim


The simulator models upwind trim and performance as never before. Years in development, the simulator uses the power of the North Sails Design Suite to model upwind trim and performance with unprecedented accuracy – in both the depiction of sail shape and performance data. Adjust every control. View from every angle. Test in a full selection of wind speeds and sea states. See the results.



The North U Performance Trim book gives complete coverage to upwind and downwind sail trim and boat handling, including mainsail and genoa trim, helming, and the trim and handling of both conventional and asymmetric spinnakers. Learn how the angle of attack, depth, and twist affect performance. See how changes in pole position change spinnaker shape. Understand your options for spinnaker takedowns. Special sections including boat handling skills and drills show you how to turn your crew into a team. Packed with illustrations, written to be read, the 208-page book will teach you techniques to sail faster.

The North U Performance Trim and North U Performance Racing Tactics books are NOT included in the registration fee, and will not be available to buy in person at the seminar. We strongly recommend you order any books in advance from the American Sailing Online Store.

SAVE 15% + FREE SHIPPINGWhen you register for the seminar be sure to include one or both North U Performance Sailing Textbooks and SAVE 15% plus all orders in the United States also qualify for FREE SHIPPING.


To complement the in-person seminars we are offering attendees the option to also own the online classes. Get instant access to these on-demand classes when you register and prepare for your seminar today. Plus you'll have unlimited access so after the seminar is over you have the opportunity to review topics as often as you need.

SAVE 75% + INSTANT ACCESSWhen you register for the seminar be sure to choose one or both North U Performance Sailing Online Classes and SAVE 75%! Your confirmation email will contain instructions on how to access the on-demand classes instantly!


Nepean Sailing Club
The Nepean Sailing Club, situated along the picturesque shores of the Ottawa River in Ontario, Canada, is a dynamic sailing hub with a history dating back to 1979. Boasting a stunning waterfront location, the club provides a welcoming environment for sailors of all ages and skill levels. Members enjoy access to a modern marina, sailing school, and vibrant social events. With a commitment to fostering a love for sailing, the Nepean Sailing Club serves as a community-oriented institution where enthusiasts can share their passion for the sport, participate in regattas, and revel in the breathtaking views of the Ottawa River.


Geoff Moore, a dedicated lifelong sailor, has amassed a wealth of diverse experiences in sailing across the globe. A graduate in Political Science from the University of Rhode Island, Geoff's roots in sailing trace back to Rhode Island, where he honed his skills. Now based in Toronto and a member of the Royal Canadian Yacht Club, Geoff joined North Sails in 2002 as a Sail Expert, simultaneously coaching and teaching North U seminars.

Geoff's sailing accolades include numerous continental and world titles, with recent triumphs such as the 2023 VXone North American Championship and the 2018 Shark 24 World Championship in Kingston, Ontario. His expertise spans various one-design classes, from J/24 to J/80, Melges 20, 24, 32, Mum 30, and more, earning victories at local, regional, and international levels.

While renowned for his success on larger boats on Lake Ontario, Geoff's contributions extend to notable wins like the Mumm 30 North American Championship. His racing portfolio encompasses prestigious events such as Chicago-Mac, Huron Mac, Newport to Bermuda, and the Pineapple Cup.

Beyond racing, Geoff's collaborative work with North's cruising clients showcases his technical prowess and deep understanding of sail handling systems, benefiting sailors globally.

All prices are in USD

Saturday, April 6th, 2024
9:00AM - 4:00PM ET

Nepean Sailing Club
3259 Carling Ave, Nepean, ON K2H 1A6, Canada

Regular Price
$149 USD
ASA Member Price
$119 USD


Receive a full refund of your registration fee (including fees paid for lunch and certifications) if you cancel at least 14 days before the event. Fees for textbooks and on-demand content are non-refundable.


American Sailing Members can claim their discount in the Member Portal. If you're not a current member then you join or renew today!

Registration for this seminar is now closed

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