Definition
A swim platform is the low-set transom deck on a yacht or tender, set close to the waterline for boarding, swimming, watersports staging, and tender launch and recovery.
Background and use
The modern superyacht swim platform is structural rather than decorative. Most yachts above 40 m carry a hydraulic platform that lowers below the waterline by 600 to 1200 mm, allowing the platform to act as a beach club at anchor and as a tender boarding step underway. Builders such as Lürssen, Heesen, Sanlorenzo, and Benetti now use the swim platform as the primary tender boarding point, with hinged side bulwarks that fold out to triple the working area.
For tender programmes the platform geometry is critical. A 9 m limousine that boards over a stern platform needs the platform's freeboard to match the limousine's gunwale within 100 to 200 mm at light load, so guests step rather than climb. Where the mothership uses a side-loading garage, the platform becomes the secondary boarding point for swim and watersports use only.
Tender swim platforms are smaller but follow the same logic: a folding teak or composite platform off the transom, with steps to the cockpit, used for swimmer recovery, gear stowage, and as a launch point for foils, seabobs, and dive kit.
Related considerations
- Hydraulic platforms below 1.5 tonnes use single-cylinder lift; above that, dual.
- Teak finish is traditional but cork composite is gaining ground for grip and weight.
- Recovery handles and underwater ladders are mandatory under most class rules.
- Anti-skid surfaces must be replaced or recoated every 2 to 3 seasons.
- Platform load capacity sets the practical limit for water-toy storage at anchor.