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These questions and their answers are gleaned from the USCG Mariners Tests, and we trust in them for their accuracy. There are over 700 questions regarding weather and navigation here and all quiz questions are picked randomly. Questions are graded individually and you do not have to answer all questions to check your answers. Don't be discouraged if you miss a few questions, some of them are pretty hard. However, the more you take this test the more you will learn!