What is the fine-grained topic of the following text: On Sunday at noon, Schrader and his crew will set out from Shilshole Bay Marina in Seattle in the 64-foot steel boat Ocean Watch on a 24,000-nautical mile journey clockwise through the Northwest Passage, down the east coast, around Cape Horn and back to Seattle. Only return the topic.
Schrader and his crew's 24,000-nautical mile journey on Ocean Watch