Lift System Rotation

Collision-free lowering path — horizontal stabilisation throughout the full stroke

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The defining engineering principle of the Rotation Lift is its parallelogram lever arrangement. Two lift arms per side are connected through a linkage that constrains the platform’s motion to a specific rotational arc. As the arms rotate downward, the platform moves outward from the transom and toward the waterline simultaneously. At every point during this arc, the platform surface remains horizontally stabilised — the tender does not tilt, slide, or shift position during lowering or raising.

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This geometry solves the most common problem with stern-mounted tender lifts: collision with the hull, drives, or trim tabs during the lowering stroke. Because the platform moves outward as it descends, it clears all aft-mounted hardware without requiring manual guidance or fender protection. For wider tenders — where the beam of the dinghy extends close to or beyond the edges of the platform — this collision-free path is not a convenience feature but a structural necessity. A conventional pivot lift that simply rotates downward on a single axis would swing the tender’s chine directly into the transom face.

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The horizontal stabilisation also means the tender remains level during the entire operation. Fuel, gear, and loose equipment stay in place. There is no point during the stroke where the load shifts to one side or where the tender’s centre of gravity moves outside the platform’s support area. For the crew operating the lift, this translates to a predictable, hands-off process: press the button, the tender descends level, the tender floats free.

Mechanically secured in the stowed position — automatically operated by hydraulics

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When the platform is in the raised, stowed position, a hydraulic safety lock engages automatically and secures the lift mechanically. This is not a hydraulic hold that depends on continuous pressure in the system — it is a physical locking mechanism that prevents any downward movement regardless of hydraulic pressure state. If the hydraulic system losespressure, if a hose fails, or if the power supply is interrupted, the platform stays locked at deck level. It does not drift, settle, or descend.

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The lock disengages hydraulically when the operator initiates the lowering sequence. This means the entire locking and unlocking cycle is automatic — there is no manual pin, lever, or secondary action required from the crew. The system locks when it reaches the top, unlocks when you press the button to lower. This matters in daily operation because it eliminates the human error vector: forgetting to engage a manual lock before getting underway, or failing to disengage it before attempting to lower the platform.

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For the shipyard and the classification engineer, a mechanical lock that is hydraulically operated and automatically engaged is the cleanest safety architecture for a stern-mounted platform carrying several hundred kilograms of tender at speed.

Six lift types covering the full range of tenders and vessel sizes

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The Rotation Lift is not a single product — it is a modular system divided into six lift types based on Safe Working Load (SWL). Type 1 handles 350 kg, suited for small RIBs and jet skis on sport boats. Type 2 covers 600 kg, the most common range for 3-metre tenders on cruisers and flybridge yachts. Type 4 spans 800 to 1,000 kg for mid-size tenders. Type 5 lifts 1,200 kg. Type 7 reaches 1,600 kg. And Type 10 handles up to 2,000 kg — covering heavy tenders, large jet skis, or dual-use platforms on yachts up to 24 metres and beyond.

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Within each type, the system offers numerous configuration options: platform carrier dimensions, arm length, mounting geometry, and control options are specified per project. The platform carrier itself is height-adjustable and inclinable, allowing precise alignment with the deck level to avoid gaps or height differences between the deck surface and the platform in the stowed position. This adjustability also accommodates different stern geometries — reverse transoms, plumb bows, stepped sterns — without requiring a dedicated product variant for each hull shape.

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For the shipyard, this modularity means a single product family covers the entire tender handling range. For the owner, it means the lift is sized and configured exactly for their tender, their boat, and their usage pattern — not an oversized or undersized compromise from a fixed product catalogue.