Dutch Ship With Chinese Crew Escape Japanese

The steamship Belmina, after a perilous journey, arrives in Seattle. Initially operating under Japanese charter, the ship's Dutch captain cleverly misled Japanese forces with false radio reports. Using homemade charts, the crew navigated away from Japanese shores, evading enemy patrols for 19 days, ultimately reaching the safety of Alaska.

What type of charts did they use to guide their escape?

What was the ultimate destination of the ship after fleeing Japanese shores?