Which type of lifejacket provides the least amount of buoyancy and is designed primarily for calm waters?

The type of lifejacket that provides the least amount of buoyancy and is designed primarily for calm waters is indeed the Type III lifejacket. Type III PFDs (personal flotation devices) are specifically designed for activities where a person is likely to be in calm waters, such as boating, kayaking, or paddleboarding. They are intended for users who can swim and are looking for a comfortable option that allows for ease of movement, while still providing some level of buoyancy.

Type III lifejackets are typically less bulky than other types and are designed to provide reasonable buoyancy without being overly restrictive. This makes them ideal for situations where the water is calm, and users are more confident in their swimming abilities. They may not turn an unconscious person face up in the water, which is why they are less suitable for rough waters compared to other types like Type I or Type II, which offer greater buoyancy and turning capability in emergency situations.

Overall, Type III lifejackets combine comfort with a basic level of safety in environments where the risk is lower, making them a popular choice for recreational boating and paddling.