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Generally speaking, in the Defense Department, there is often information transmitted to and from various places. The Trolian communication methods are numerous, with the Spirit Crow Messenger being just one of them. They also have Spiritual Power Equipment similar to fax machines, as well as instant communication tools like wireless telephones.
However, the former seems to be more expensive and is used less frequently.
The latter has a very short communication distance, approximately only about one thousand yards.
Because Rod had frequented the Defense Department, he had finally completely figured out some of the commonly used terms there. They particularly liked to use steps and yards as units of distance—one step equates to the distance of a normal adult (excluding dwarves) taking a small step, which is about one-third of a meter, and one yard is three steps, almost equivalent to one meter.
