CaptainsGround
Free, citation-backed USCG Captain's License exam prep
什么是 CaptainsGround？
USCG Captain's License prep usually costs $400–900. CaptainsGround is free: lessons + 500+ drill questions, each linked to the exact CFR / COLREGs rule it tests. Plus NMC-format mock exams, FSRS flashcards, and an adaptive study plan.
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