I'm on a towboat and my Type IV life jacket is equipped w/the following:
Blinking red light (for night ops), small wide beam LED flashlight, Doug Ritter PSK (thank you Stu) in a radio pouch (similar to a magazine pouch), 2 35gal and 1 55gal trashbags, leather gloves, another (empty) radio pouch (to carry a handheld VHF-FM radio), sunglasses, and 2 carabiners (to carry tools and hardhat).