BOATsmart! USA Knowledge Base

Module 02 - Boating Equipment

Type IV: Throwable Device

This flotation device type is meant to be used anywhere that you’re boating but is best used in calm waters where rescue is always available. These devices are meant to be thrown to people who have fallen overboard—not worn by them. The person in the water must hold onto the Type IV device in order to stay afloat.

The throwable device must be in good condition (no rips or tears) to be considered Coast Guard-approved. Additionally, the holding brackets for the throwable device should be designed to allow Type IV devices to float free from your boat if it’s sinking!

The Type IV throwable devices available are:

Buoyant cushions.
Life rings.
Horseshoe buoys.

Note: If your boat is over 16 feet in length, federal law requires you to have one Type IV throwable device onboard, in addition to a lifejacket for each person on the boat.