Inflatable rescue rafts are slightly different than the emergency life rafts that people may need to use from time to time. These rafts are not designed to handle the rigors of the sea for very long and are best suited for times when the waves are somewhat calm. In tame conditions, they can do a great job at performing the duty they were designed for.
Inflatable Rescue Rafts VS Life Rafts
Inflatable rescue rafts should be used whenever someone needs to be transported from one boat to another or if they have fallen overboard and need to be saved. Some people may see these rafts as something to use when they need to abandon their ship but most inflatable rescue rafts are not truly prepared for big waves and nasty weather. In short, if you are going to be in the raft for a short period of time in relatively calm waters, these rafts will work fine.
If you are looking for a raft that will be able to sustain you in case you are stranded at sea without a boat for more than an hour or two, you need to look into a life raft. A well built life raft can handle huge waves and terrible weather where rescue rafts would fail. Life rafts usually have a canopy for protection against the weather and a ballast system to keep the raft in an upright position even if waves are moving the raft to and fro.
Rescue rafts are considerably cheaper than life rafts but they do not provide anywhere near the level of safety and protection for its passengers. If you travel out on coastal waters or onto the open sea, you will need to bring along a life raft with enough room for everyone on the boat. Depending on the model you purchase, you may need to buy two or more rafts to handle the maximum number of passengers for your vessel.