What safety feature is NOT typically found on a Type 1 life jacket?

A Type 1 life jacket, also known as an offshore life jacket, is designed to provide maximum buoyancy and support in rough waters. It typically includes safety features such as retro-reflective tape to ensure visibility, lights that assist in locating individuals in the dark, and whistles that can be used to signal for help.

The life preserver ring is not a feature of a Type 1 life jacket; rather, it is a separate flotation device that's used for throwing to a person in distress. It operates differently from personal floatation devices worn directly by individuals, like life jackets, and is typically deployed to offer assistance from a distance without requiring the distressed individual to wear anything. Therefore, specifying that a Type 1 life jacket does not include a life preserver ring clarifies one of the distinctions between various safety equipment used in emergency situations.