Secche di Tor Paterno - Le Gorgonie

A fully submerged offshore shoal about 5 nautical miles out in the open Tyrrhenian Sea, so it has no land shelter and surface conditions govern access. It is most exposed across the open south-western quadrant: the SW Libeccio (the dominant Tyrrhenian heavy-weather wind-wave) and the open S, W and NW windows, with the SSE end of the Scirocco's long African fetch also reaching in. The Roman coast sits only about 5 nautical miles away across the landward arc, so the N through E sectors are strongly fetch-blocked and the shoal is dived only on calm days.