The buoyancy rating of a life jacket is typically expressed in Newtons (N), and common ratings are 50, 70, 100, and 150 N. These numbers indicate the amount of buoyancy the personal flotation device (PFD) provides; higher numbers mean greater flotation capability.
Here's a breakdown:
- 50 N: Suitable for sheltered waters and near-shore activities where help is close by. Often referred to as buoyancy aids.
- 70 N: Offers more buoyancy than 50 N and is suitable for general recreational boating.
- 100 N: Designed for general purpose use, including coastal and offshore boating. They will usually turn an unconscious person face up.
- 150 N: Intended for offshore use, especially in rough conditions. Provides significant buoyancy and turning capability.
Most life jackets available on the market provide at least a 70 N rating. It's important to select a life jacket with an appropriate buoyancy rating based on the intended use and water conditions. Factors to consider include the wearer's weight, clothing, and swimming ability.
