Even if you’ve been diving for a short time, you’ll notice that people use different kinds of fins. Some people have blade fins, while other divers have fins that are split down the middle. The differences between these two types of fins are related to propulsion power.
Fins: Split Fins VS Blade Fins
Blade/paddle fins have been around for a long time (and it’s what you see fish using!), but split fins are a relatively new option for divers. The idea behind split fins is that instead of just propelling the diver forward, the split creates a vortex that assists in movement. Another benefit of splits is that the opening allows water to pass through easily on the upward stroke. Having the split is more energy efficient than having to kick upward with a standard blade fin. This makes the split fin easier to use in many cases and allows divers to conserve air because they don’t have to kick as hard.
So split fins are good for casual divers, inexperienced divers who may not have good kicking technique yet, and divers who have ankle or knee problems and cramp easily. When you use a blade fin you’ll notice more power on your kick. And many people argue split fins aren’t enough to fight in strong current.
So which is for you?
The type of fin used should depend on the type of diving. Splits can be more effective in easy dive sites with little or no current. They are also helpful if the diver cramps easily or has joint problems. However, in more technical dives or dive sites with a strong current blade fins should be used. Because they provide more powerful kicks, and work well with multiple types of kicks.