The navigation log recorded only simple things.
It detailed where the Giant Bird had docked, what supplies were purchased, which routes were sailed, the weather encountered, and which company's merchant ships were robbed on which routes, and so forth.
Without cross-referencing a navigation chart, Duge had no idea what locations those routes corresponded to.
What he cared more about were the significant events recorded by Paul that took place around the world, which helped him understand the world better.
For instance:
The Ghost Ship suddenly appeared in a certain sea lane in a certain year and month, encountered a merchant fleet, and all the sailors on board disappeared without exception;
The king of the East Sea, Mahamazu, had once again defeated the royal navy and killed the naval commodore Kike, raising the bounty on his head to 200,000 Gold Coins;
