Einarm-Lift
Not every yacht has the stern width for a dual-arm lift system. On vessels with closely spaced drives, pod propulsion, or narrow transoms, a two-arm configuration simply does not fit.
The Single-Arm Lift is a hydraulic tender lift designed for exactly this constraint. It uses one central lift arm positioned on the vessel's centreline — between the drives — where space is available and where a standard lift cannot go. One system. One arm. Fits where others cannot.
Fits where dual-arm systems cannot — positioned in the space between the propulsion units.
The Single-Arm Lift's central positioning is its reason for existence. The lift arm mounts on the centreline of the transom, between the drives, using the only space available on vessels where the propulsion configuration leaves no room on either side for a conventional lift arm.
This central mounting does not compromise the lift's function. The arm connects to the platform carrier through a lever arrangement that distributes the load evenly across the platform width. The platform moves as a unit, lowering level to the water surface regardless of the single-point suspension geometry.
For naval architects and shipyard engineers, the single-arm configuration opens up tender handling as an option for vessel types where it was previously not feasible. Pod yachts, IPS drive vessels, and sport boats with closely spaced outboard motors can all be equipped with a hydraulic tender lift using the single-arm design.
Mechanically secured in the stowed position — automatically operated by hydraulics.
When the platform is raised to the stowed position, a hydraulic safety lock engages automatically and secures the lift with a mechanical locking hook. The platform cannot descend unless the operator deliberately initiates the lowering sequence. The lock is not a hydraulic hold — it is a physical, mechanical constraint.
The lock disengages hydraulically when the operator initiates the lowering sequence. The entire cycle is automatic: the system locks on arrival at the stowed position and unlocks on command to lower. The operator does not interact with the lock mechanism directly.
The mechanical locking hook is engineered for the full SWL of 600 kg plus the dynamic loads generated by the vessel's motion at sea. The hook geometry and engagement force are calculated to hold the platform secure through the wave loads and accelerations encountered in normal operating conditions.
Height-adjustable and inclinable — flush alignment with any deck geometry.
The platform carrier on the Single-Arm Lift is height-adjustable and inclinable, allowing precise alignment with the deck surface in the stowed position. When the platform is raised, it sits flush with the surrounding deck — no gap, no step, no visible intrusion into the deck plane.
On sport boats and compact cruisers — the primary market for the single-arm configuration — stern geometry varies significantly between builders and models. The adjustable carrier accommodates this variation without requiring custom fabrication for each installation. Height and inclination are set during installation and do not require adjustment in service.
This matters for both aesthetics and safety. A gap between deck and platform catches toes, collects water, and looks unfinished. The adjustable carrier eliminates this gap across the full range of stern geometries the Single-Arm Lift is designed to serve.
Visual overview
Examine the Single-Arm Lift from every angle — frontal view showing the central arm between twin drives, side profile of the lift in stowed and lowered positions, and close-up of the safety lock mechanism.
Technical Specifications
A single-arm hydraulic tender lift for yachts with limited stern space. Central arm mounts between drives. Hydraulic safety lock and adjustable platform carrier included as standard.
LOAD CAPACITY
600 kg Safe Working Load (SWL). Covers small to mid-size tenders, jet skis, and similar watercraft.
MATERIAL
Main components manufactured from stainless steel AISI 316L (1.4404) and 1.4462 (Duplex), electropolished for maximum corrosion resistance in marine environments.
HYDRAULICS
Hydraulic unit calibrated for performance and volume. Synchronised arm movement with equalizer control block (±2% tolerance). Available in 12V and 24V.
SAFETY LOCK
Mechanically secured in the upper position by a locking hook. Automatically operated hydraulically — engages on arrival at stowed position, disengages on lowering command.
PLATFORM CARRIER
Height-adjustable and inclinable to avoid gaps and height differences between deck and platform. Configured per vessel type during installation.
"The lifts are not just functional — they match our design and standards. With H+B, it feels more like a team than a supplier relationship."
Frequently asked questions
Answers to the most common questions about the Single-Arm Lift.
The Lift System Rotation uses two lift arms — one on each side of the platform — connected through a parallelogram lever system. This provides inherently balanced lifting and higher load capacity. The Single-Arm Lift uses one central arm and is designed for vessels where the stern geometry does not allow two arms to be installed.
Yes. The 600 kg SWL covers both small to mid-size tenders and jet skis. The platform carrier and mounting configuration are set during the engineering phase based on the specific watercraft being handled.
Yes. The single arm is engineered for the full 600 kg SWL plus dynamic loads from vessel motion at cruising speed. The lever arrangement between the arm and the platform carrier distributes the load evenly. Structural calculations are provided in the engineering documentation.
The platform is secured by a mechanical locking hook that engages automatically when the lift reaches the stowed position. This hook holds the platform mechanically, independent of hydraulic pressure. A loss of hydraulic pressure while the platform is stowed does not result in an uncontrolled descent.
Yes. The system requires a structural mounting point on the centreline of the transom between the drives, and a location for the hydraulic unit within the vessel. H+B technics assesses the existing stern drawings during the engineering phase and confirms installation feasibility before fabrication.
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Customization option
Tailored solutions perfectly suited to your needs. At H+B technics, we not only offer our proven products but also the opportunity to customize them according to your specific requirements. Our experienced team is ready to support you in developing and realizing bespoke products for your yacht or project, always with a strong focus on quality, innovation, and precision.
Whether it’s special dimensions, functions, or an entirely new design, we bring your vision to life. Rely on our expertise and let’s make your ideas a reality together.
Slawa Eichwald
Project Manager
Start your project
Every Single-Arm Lift is individually configured for your vessel. Share your stern drawings, drive layout, and tender specification and we support you from the first concept to the finished installation.
