Question 22 RVR04 - Master or Mate of LT 200 GRT

The Correct Answer is C 1. **Explanation for why option C ("The St Lawrence River to Trois-Rivieres") is correct (i.e., why it is NOT included in the Great Lakes definition):** The Inland Rules of the Road define the extent of the "Great Lakes" for regulatory purposes in the United States. According to the Inland Navigation Rules Act of 1980 (33 U.S.C. § 2001, Rule 3(k)), the "Great Lakes" means the five Great Lakes (Superior, Michigan, Huron, Erie, and Ontario) and their connecting and tributary waters as far as the mouth of the Detroit River at Lake Erie, and as far as the ports and harbors on these waters. The St. Lawrence River is the primary outlet for the Great Lakes system, but the rules governing the Great Lakes system terminate well upstream of the point where the St. Lawrence River leaves Lake Ontario. The river down to Trois-Rivières is located deep within Canada and is not included in the U.S. definition used for delineating the boundary of the Inland Rules, making it the area that is *not* included. 2. **Explanation for why the other options are incorrect (i.e., why they ARE included in the Great Lakes definition):** * **A) Portions of the Calumet River:** The Calumet River connects to Lake Michigan and provides access to ports and harbors (such as the Port of Indiana/Burns Harbor area) directly serving the Great Lakes. The Inland Rules expressly include ports and harbors within the Great Lakes system, meaning portions of the Calumet River are included under the Inland Rules' definition. * **B) Saginaw Bay, Michigan:** Saginaw Bay is a large inlet of Lake Huron. Since Lake Huron is one of the five Great Lakes, its tributary waters and harbors (which Saginaw Bay effectively is) are included in the definition of the Great Lakes system under the Inland Rules. * **D) Portions of the Chicago River:** The Chicago River system connects directly to Lake Michigan and is an essential part of the major ports and harbors served by the Great Lakes. Therefore, portions of the Chicago River are specifically included under the Inland Rules' definition of the Great Lakes waters.