Which type of PFD is ideal for use in emergencies while on boats?

Type I personal flotation devices (PFDs) are specifically designed for use in emergencies, providing the highest level of buoyancy and safety. They are intended for use in rough or open water where rescue may be delayed, making them particularly suitable for emergency situations on boats. These PFDs are designed to turn most unconscious wearers to a vertical or face-up position in the water, which is critical for survival if someone falls overboard or is incapacitated.

In contrast, other types of PFDs serve different purposes. Type III devices are popular for various activities due to comfort, but they may not provide adequate flotation for an unconscious person. Type IV is a throwable device, effective for rescuing someone but cannot be worn, and Type V is designed for specific activities and may not be as versatile or effective across a range of emergency scenarios. Thus, Type I PFDs are the optimal choice for ensuring safety and increased chances of survival during maritime emergencies.