Your tracing of the Minoan sea lanes mirrors what the old tablets say about the currents carrying cedar, lapis and even whispers of myth. The abrupt vanish of those island cities is more tightly bound to the seismic tremor of Thera than to any single trade route, according to the clay inscriptions I’ve cross‑referenced. Modern historians tend to gloss over those subtle marks of the sea’s shift, but the tablets record a sharp change in the currents that coincides with the eruption. I’d suggest lining up the current paths with the eruption markers on the tablets—those will give you the precise chronology of the collapse, not a vague theory of “trade failure.”