LIFE BUOY is a type of water lifesaving equipment, also called life ring, usually made of cork, foam or other light weight materials with a small specific gravity, and the outer bread is covered with canvas, plastic, and the like. The lifebuoy for swimming practice can also be made of rubber and filled with air, also known as a rubber band.
LIFE RAFT is a boat that has no self-propelled capacity for lifesaving on board. The life raft is stocked with a certain amount of food and fresh water for occupants to use for rafting at sea.  Life rafts can be divided into rigid life rafts and inflatable life rafts according to their structure.
Lifeboat is a special boat that is placed on board a ship to rescue occupants when the ship is in danger. Use paddles, sails, power machines, etc. The boat is often equipped with an air tank so that the boat still has sufficient buoyancy after entering the water to ensure the safety of the boat and the persons on board. There is also a certain amount of fresh water, food and daily necessities on the lifeboat of the seagoing vessel.