Unidentified ships?

Yes, sir.

Several of our ships have reported hearing the same rumors from the other fleets...

...when we met up for military exercises and expeditions.

The Navy HQ also sent out similar reports compiled from expeditionary fleets and even fleets training in their home waters.

When we discover new ships created by the sea, their attachment data is empty.

However, these ships do possess an attachment data.

It's just that...

...the naval base that they're supposedly attached to was disbanded 60 years ago and it remained a ruin to this day.

When It is...