Which of the following is NOT a type of vessel the Coast Guard typically boards?

The reason military vessels are not typically boarded by the Coast Guard lies in their distinct operational and jurisdictional status. Military vessels operate under the authority of their own armed forces and are governed by different laws and protocols than civilian vessels. The Coast Guard primarily focuses on enforcing regulations and ensuring safety within the jurisdiction of U.S. waters and on vessels that are commercial or recreational in nature. This includes routine boardings of commercial fishing vessels, yachts, recreational boats, and cargo ships to check for compliance with safety, environmental protection, and customs regulations.

In contrast, military vessels are protected under inter-governmental agreements and sovereign immunity, which restricts unauthorized access or boarding by other entities, including the Coast Guard. Thus, when considering the types of vessels the Coast Guard typically boards, military vessels stand apart due to their operational context and the legal frameworks governing their status on the open water.