Adventure brief
ASA 104 Trimaran Bareboat Cruising
Learn to command a 47-foot trimaran on a focused, three-day ASA 104 course from Marina del Rey to Catalina Island. Small, US Coast Guard-licensed classes practice real-world navigation, docking, and heavy-wind handling in Catalina's sheltered coves.
From the harbor at 13555 Fiji Way in Marina del Rey, ASA 104 Trimaran Bareboat Cruising delivers a hands-on, three-day push into open-coast seamanship and island navigation. Starting at Naos Yachts, students step aboard a 47-foot trimaran or 38-foot sloop to practice advanced sail trim, heavy-weather handling, anchoring, and docking as they surface-click toward Catalina Island's protected coves - Two Harbors, Emerald Bay, or Cat Harbor - depending on wind and instructor plan. This course is built for crews ready to move from coastal day-sailing to multiday command.
In compact, instructor-led modules you'll master provisioning, galley operations, routine systems checks, auxiliary engine use, and dinghy operations while practicing chart plotting and GPS coastal navigation. US Coast Guard-licensed, ASA-certified instructors lead small classes capped at four students to maximize hands-on time and real-world repetition in moderate to heavy winds and sea states. Catalina changes the picture: sheer rock ridgelines of Catalina's Avalon and the kelp forests that fringe its bays give students varied practice in entering constricted anchorages, reading currents, and performing close-quarters maneuvers.
The island's marine life - sea lions, garibaldi, and passing dolphins - adds teaching moments about local navigation hazards and protected habitat etiquette. It is not a scenic sideline but a real training ground where technique meets unpredictable ocean energy. Expect hard work and quick learning.
The usual itinerary moves between Two Harbors and Emerald Bay or Cat Harbor, with instructors tailoring lessons to conditions. Prerequisites ASA 101 and ASA 103 mean you'll arrive with basic sail handling and rules of the road, ready to expand into captain-level decision-making. Limited class sizes mean more helm time, more lines to trim, and more time troubleshooting systems under instructor supervision.
Practical benefits extend beyond certification. Graduates leave with confidence in provisioning for multi-day cruises, running onboard electrical and mechanical systems, and the judgment to skipper a coastal passage. For sailors in Southern California, this course is a concentrated route to competence and a direct way to learn island handling where rocky shorelines, kelp, and sudden wind shifts test real-world skills.
Students sail aboard the newest fleet of Beneteau monohulls and Lagoon catamarans as well as the 47-foot trimaran used for handling drills, so you'll sample different platforms and learn how stability, reefing strategy, and helm feel change between multihulls and sloops. The course fee is $2,200 per student; Club membership details and a 10% instructor discount are available through Naos Yachts. Small groups, certified instructors, and Catalina's compact, rocky anchorages make this an efficient, high-value path to bareboat readiness.
Bring sea-stable footwear and gloves.
Adventure tips
Plan your experience.
Curated tips for an optimal adventure.
- 01Bring layered foul-weather gearessential
Conditions can switch quickly offshore; waterproof, breathable layers keep you comfortable and safe on deck.
- 02Wear non-marking, grippy shoesessential
Good deck footwear improves footing during maneuvers and protects boat gelcoat.
- 03Know your ASA prerequisitesinfo
Complete ASA 101 and 103 before enrolling to make full use of hands-on time in ASA 104.
- 04Pack motion-sickness remedieswarning
Practice in moderate to heavy seas makes pills or wristbands useful for focused learning.
Recommended gear
What to bring.
Waterproof shell jacket
Keeps you dry and windproof during offshore passages and cold, wet decks.
springEssentialNon-marking deck shoes
Improves traction and protects the boat's finish during sail handling.
summerEssentialGloves (sailing-specific)
Protects hands during line work and sail trim.
EssentialDry bag or small sea locker
Keeps electronics and spare clothes dry on deck and in the cockpit.
Local insights
Context for the journey.
Nearby secrets
Sheltered kelp edges in Emerald Bay for close wildlife views, Quiet back-anchorage slips of Cat Harbor for hands-on docking practice
Local fauna
California sea lion, Common dolphin
Historic heritage
The island sits within the traditional territory of the Tongva people and became a popular recreational destination in the early 20th century.
Mindful exploration
Respect kelp beds and stay clear of reef habitats; practice clean-provisioning and follow local marine protected area rules to minimize impact.
Photography tips
Capture the moments
- Viewpoints
- Approach to Two Harbors for island ridgeline shots, Anchored stern in Emerald Bay looking toward kelp forests, On-deck during sail trim for action and crew portraits
- Subjects
- Island shorelines and granite ridgelines, Sail handling and hardware close-ups, Marine wildlife examples, e.g., sea lions and dolphins
- Best times
- Golden hour, Sunrise, Late afternoon when winds ease
Frequently asked questions
Before you go.
What are the prerequisites for this course?
You must hold ASA 101 and ASA 103 prior to enrolling so the ASA 104 curriculum can focus on advanced cruising skills.
Where do classes meet?
Check-in takes place at Naos Yachts, 13555 Fiji Way, Marina Del Rey, CA 90292, USA.
How many students per class?
Classes are limited to 3 to 4 students with a 2-student minimum to run the course.
What boats are used for instruction?
Instruction uses a 47-foot trimaran or 38-foot sloop and the school's fleet of Beneteau monohulls and Lagoon catamarans.
What does the course fee cover?
The listed fee ($2,200 per student) covers instruction and on-boat training; check Naos Yachts for specifics on provisioning and extras.
Is this course suitable for rough conditions?
Yes; ASA 104 is designed for moderate to heavy wind and sea conditions and teaches heavy-weather handling and safety protocols.