The ship-girls summoned by Chen Yu, due to their unique nature as military vessels, were able to utilize the modern human communication networks. They could contact each other at any corner of the world via human satellites, and their demigod essence ensured that their communication remained undetected by humans.
The distress signal Hood had just sent out was conveyed in this manner to the other ship-girls scattered around the world. Through the Necromantic Space as an intermediary, they could appear beside any ship-girl in need at any moment.
However, with the other ship-girls all on missions and dispersed across the globe, Hood did not expect them to arrive in time to provide reinforcements.
But unexpectedly, it was not Bismarck, whom she had hoped would come from Europe, who arrived first. Instead, Kaga had traveled halfway around the world from the Pacific.
As for the second figure to appear, it was even more surprising to Hood, for it was Chen Yu himself.