Question 368Navigation General

The correct answer is B) red triangles. Under the U.S. Aids to Navigation System on the Western Rivers, passing daymarks on the left descending bank are red triangles. This is in accordance with the lateral buoyage system, where red triangular daymarks indicate the left side of the channel when traveling downstream. The other answer choices are incorrect because green squares (A) and green diamonds (C) are used to mark the right descending bank, while red diamonds (D) are not a standard daymark shape in the Western Rivers system.