raft, biofuel engine, sustainable, eco-friendly, wooden structure, barrels for buoyancy, solar panels, green technology, algae-based fuel system, compact design, water filtration, self-sustaining, ocean, clear skies, midday sun, soft light, wide-angle shot, survival, adventure, innovation, resource management, DIY, clean energy, environmental conservation, blueprints, handcrafted, natural materials, efficient propulsion, calm sea, horizon view, practical engineering, renewable resources, carbon-neutral transportation.