Drivetrain access
Shafts, couplings, shaft seals, bearings, and alignment can be checked, adjusted, and serviced by any competent marine engineer — no brand-specific knowledge required.
Propulsion / serviceability
Why does Antares choose shaft drives instead of sail-drives?
Antares uses shaft drives because they produce a propulsion layout that is practical to inspect, maintain, and service — including in the remote ports and anchorages where long-range cruising happens.
The direct answer
Shaft drives reduce forced haul-outs and keep service familiar anywhere.
Here’s why this matters when you’re 1,000 miles from your home yard. Every propulsion choice has tradeoffs. Antares uses conventional shaft drives because the system is simple, accessible, and familiar to marine engineers worldwide. For owners cruising far from their home yard, that means fewer specialized service events, fewer forced haul-outs, and a drivetrain a competent mechanic can understand.
Owner perspective
I was able to service a leaking shaft seal in the Solomon Islands without hauling the boat. Otherwise, I would have had to sail to Australia for a proper haulout.
— Antares 44 owner
Less underwater complexity
A shaft-drive installation avoids the underwater leg, lower housing, and diaphragm or seal assembly that a sail-drive requires below the waterline.
Serviceable in more places
Conventional shafts, couplings, bearings, seals, and alignment are familiar to competent marine mechanics in cruising regions around the world.
Technical comparison
Sail-drive versus shaft-drive: a working comparison.
This video covers the practical differences between sail-drive and shaft-drive propulsion on catamarans — service access, underwater components, galvanic considerations, and the maintenance implications of each. It is a useful reference before asking further questions about propulsion on any specific model.
Drivetrain photos
What the comparison looks like in practice.
These images show shaft-drive components alongside sail-drive service and maintenance realities. The difference in underwater componentry and service access is easier to read from photographs than from description alone.
Evaluation checklist
Questions to ask when reviewing propulsion on any long-range catamaran.
These questions apply regardless of which system a builder uses. The answers reveal whether the propulsion choice fits how and where you actually plan to cruise.
- Can shafts, seals, couplings, and bearings be inspected and serviced without hauling or removing the engine?
- What underwater components require periodic replacement, and what are the service intervals?
- What galvanic protection does the drivetrain require, and how is that monitored and maintained in use?
- Are parts and qualified service available in the regions on your cruising plan — not just at the home yard?
- What does a haulout inspection of the propulsion system involve, and how long does it take?
- How is engine access arranged, and can routine maintenance be completed by one person without special tools?
- What spares should be carried for the drivetrain on a passage of 30 or more days from a provisioning port?
Buyer questions
Clear answers before you compare boats.
Use these questions to frame a more useful conversation about the Antares 44, Antares 46, and the way you plan to cruise.
Are shaft drives always better than sail-drives?
No universal answer applies. Antares chooses shaft drives because they fit its priorities around serviceability, underwater exposure management, and long-range ownership. Buyers should evaluate both systems against how and where they plan to cruise.
What should buyers ask about sail-drive maintenance?
Ask about underwater housing and diaphragm or seal service intervals, galvanic protection, corrosion monitoring, haulout requirements, and parts and technical support availability in the regions on your cruising plan.
Do shaft drives affect handling under power?
Propeller selection, rudder geometry, hull form, and engine placement all shape handling. Antares frames shaft drives as part of the whole-boat design — the propulsion geometry connects to how the boat tracks, responds, and maneuvers.
Ownership fit
Planning to cruise beyond your home yard?
Ask how Antares propulsion, construction, and owner support are designed for serviceable bluewater ownership.