Shockwave Seats Expands Impact-Reducing Options for Superyacht Tenders

The challenge is not simply whether a tender can reach top speed

Superyacht tenders are often expected to complete frequent shore transfers while carrying guests who may be unfamiliar with high-speed boats. In open water, short steep waves can produce repeated shocks through a rigid seat and its supporting structure, even when the operator maintains a reasonable passage speed. Shockwave Seats has been developing marine suspension products intended to reduce some of these transmitted impacts.

Originally associated with professional applications including search-and-rescue and military workboats, its suspension mechanisms are increasingly discussed for luxury tender installations. That background matters because a tender frequently alternates between quick passenger transfers, waiting alongside the yacht and demanding conditions away from a sheltered marina.

The published movement figures describe suspension travel

The company describes cushioned seat bases with about 100 millimetres of vertical suspension travel and 38 millimetres of forward movement. The suspension allows the seat and its occupant to move in a controlled way relative to the boat's deck rather than transmitting every motion through a fixed pedestal.

Those measurements are not promises that jolts disappear, nor do they quantify a reduction in medical injury risk for any particular sea state. Shock absorption depends on the seat setting, occupant weight, motion frequency, hull type and how a boat is driven. A suspended seat can improve the experience without making inappropriate speeds safe.

Guests and working crew need different seating arrangements

A tender carrying hotel-style guests may require armrests, reliable handholds and simple instructions for using suspended seats, while a crew boat may prioritise quick movement and access to working equipment. The correct seat should follow the vessel's planned use, passenger numbers and expected boarding conditions rather than a single universal specification.

Deck layouts also need to accommodate suspension travel. A seat that moves vertically or forwards requires clearance from the console, grab rails and the passenger behind it. The structure beneath the mounting point must be assessed for the loads transmitted by the seat and its occupants.

Retrofitting has limits that need to be examined

When a tender is already in service, replacing fixed seat bases may seem a straightforward comfort improvement. The existing cockpit may, however, lack enough height or space to preserve safe visibility, steering access and evacuation routes after the new suspension hardware is fitted.

Installation should therefore involve the tender builder or a qualified technical contractor, particularly when drilling or reinforcing deck structures. Tender managers should also check maintenance requirements for moving joints, dampers and other parts exposed to salt water.

Good helming remains the most important protection

The broader operational benefit of shock-reducing equipment is the possibility of making necessary transfers less tiring. Owners can value smoother rides, but crew also benefit when repeating passages over many working hours.

Suspension equipment should form part of a wider tender-safety plan that includes appropriate weather limits, passenger briefings, life-saving equipment and speed management. No seat design removes the skipper's responsibility to choose a safe route and handling style for the conditions.