Taranto's harbor geometry protected Giulio Cesare

Why was Giulio Cesare so difficult to hit during a Taranto attack simulation?

Her berth leaves almost no workable torpedo approach, while the possible southeastern route crosses heavy defenses.

In repeated Taranto attack simulations, Giulio Cesare proves much harder to reach than the other battleships. Littorio is exposed, and workable approaches exist against Cavour, Duilio, Doria, and Vittorio Veneto. Giulio Cesare's position leaves almost no usable torpedo run. The possible approach from the southeast crosses so many defenses that the attacking aircraft are unlikely to survive.