During the 1965-1970 period, what type of vessels did the Coast Guard use in Vietnam?

• A. Deep-draft warships
• B. Shallow-draft warships
• C. Submarines
• D. Aircraft carriers

Answer: (B)

Shallow-draft vessels were essential because Vietnam’s riverine and near-shore environments require boats that can navigate in very shallow water and tight channels. During 1965–1970, the Coast Guard operated in coastal and inland waterways, where small, shallow-draft warships could maneuver through rivers and estuaries to patrol and interdict effectively. Deep-draft ships are designed for open-ocean work and would struggle in these environments, while submarines and aircraft carriers are not suited to brown-water operations or the Coast Guard’s typical missions. The vessels best matched to those conditions were the shallow-draft warships.