Upper panel: Poincaré surfaces of section in the (x, v_x) plane for selected trajectories at the boundaries of the sailboat region with μ = 0.13. Three trajectories correspond to different positions within the sailboat: leftmost edge, center, and rightmost edge. Quasi-periodic orbits appear as closed curves, confirming stability. Bottom panel: map of LCN in the same region for case μ = 0.13. The most negative regions indicate less chaotic trajectories.