Nothing has been more thoroughly researched at Marinetek over the past decades than the series of Breakwater Pontoons. These world famous wave attenuator pontoons have been installed all over the world.

For floating wave attenuators and heavy industrial use

Breakwater Pontoons, now in third generation, have often been installed in the harshest environments. No single unit has ever failed and in some cases the Marinetek Breakwater has been the only pontoon to withstand the test. In Praia da Vitoria in the Azores, after the tropical storm Tanya had raged for two days, the Marinetek Breakwater was the only pontoon still in place.

This kind of exceptional strength, coupled with excellent wave attenuation, is a design achievement resulting from technical research undertaken worldwide. Tank testing, theoretical calculations and field tests have been the norm. Results are impressive – the third generation breakwater has approximately 30% better wave attenuation than competitive products. Justifiably proud of the effectiveness of its system, Marinetek is the only breakwater manufacturer in the world to publish wave attenuation diagrams with proper research for its different breakwater models.

Breakwater Pontoons reduce the wave height and strength by directly deflecting some of the energy and dissipating smaller amounts by friction and turbulence. The main technical parameters, i.e. width, height, weight and moment of inertia, are selected for maximum attenuation capacity. The connection between the pontoon units is semi-flexible with sufficient rigidity to enable the breakwater to work at its highest capacity.

Technical data

Width with fenders (m) 3.3 3.8 3.3 4.3  5.3 
Concrete width (m) 3.0 3.5 3.0  4.0  5.0 
Height (m) 1.0 1.2 1.8  1.8  1.8 
Weight (t/m) 1.29 1.96 1.71  2.04  2.62 
Net capacity (kN/m²) 5.5 6.2 5.5  6.0  6.0 
Freeboard (m) 0.55 0.62 0.55  0.60  0.60 
Strength of joint (kN) 2×703 2×812 2×812  2×812  2×812 
Joint gap (mm) 90 90 90  90  90 

Concrete strength

45 N/mm2 steel reinforced plastic fibre concrete. Exposure class according to European EN 206-1 standard


Expanded polystyrene, density 15 kg/m3


Partly or fully hot dip galvanised steel

Optional accessories

Timber or wood composite deck
Fixing rails
Finger fixing system
Cable ducts and fenders (timber or wood plastic composite)