Question 22 RVR02 - Master of LT 500-1600 GRT

The Correct Answer is C **Explanation for Option C (Correct Answer):** Option C, "The St Lawrence River to Trois-Rivieres," is the correct choice because the Inland Rules limit the eastern extent of the Great Lakes system on the St. Lawrence River. According to 33 CFR 89.27(a)(3), the Great Lakes, for the purposes of the Inland Rules, include: **"The St. Lawrence River as far east as the lower exit of St. Lambert Lock."** Trois-Rivières is located significantly downstream (east) of the St. Lambert Lock, near Quebec City. Waters east of the St. Lambert Lock are generally considered International Waters and fall under the application of the International Regulations for Preventing Collisions at Sea (COLREGS) or specific Canadian regulations, but they are explicitly excluded from the scope of the U.S. Inland Rules' definition of the Great Lakes. *** **Explanation of Why Other Options Are Incorrect (They ARE included):** * **A) Portions of the Calumet River:** This is incorrect because 33 CFR 89.27(a)(1) specifically includes the Calumet River as far as the Thomas J. O'Brien Lock and Controlling Works. * **B) Saginaw Bay, Michigan:** This is incorrect because Saginaw Bay is a major bay of Lake Huron. The rules define the Great Lakes as including "Lake Huron... [and] All bays, arms, and inlets thereof" (33 CFR 89.27(a)(4) and (5)). * **D) Portions of the Chicago River:** This is incorrect because 33 CFR 89.27(a)(2) specifically includes the Chicago River as far as the O'Brien Lock.