Trampoline (multihulls)

A trampoline on a multihull vessel, such as a catamaran or trimaran, is a flexible netting or fabric structure stretched between the hulls or between the main hull and an ama (outrigger). Its primary purpose is to provide a usable deck area for crew movement, lounging, and gear storage while minimizing weight and windage.

The trampoline material is typically a woven mesh of synthetic fibers, such as polyester, polypropylene, or nylon. The weave allows water and air to pass through, reducing the risk of water accumulation and minimizing the trampoline's resistance to wind. The material is chosen for its strength, UV resistance, and resistance to salt water degradation.

The trampoline is usually attached to the hulls or support structures via a lacing system using rope or cord, or with webbing secured to the frame. The tension of the lacing is critical for maintaining the trampoline's shape and providing a firm surface. Over time, the trampoline may require re-tensioning or replacement due to stretching or wear.

Different trampoline designs exist, varying in mesh density, material thickness, and attachment methods. The choice of design depends on the size of the multihull, the intended use, and the desired level of comfort and durability. Some trampolines incorporate reinforcement patches in high-stress areas to prolong their lifespan.