The buoy can float at the surface (lasting 3–4 years) or lie subsurface to avoid detection and surface hazards such as weather and ship traffic. Subsurface FADs last longer (5–6 years) due to less wear and tear, but can be harder to locate.
The buoy can float at the surface (lasting 3–4 years) or lie submerged to evade detection and surface hazards such as weather and ship traffic. Submerged FADs last longer (5–6 years) due to less wear and tear, but are harder to locate.