Build a Surfboard Episode 1: Shaping

Step 4 Dust Collection

If you just let the shavings spew out of your planer you'll create a really amazing mess.
You can see it done that way in the movie "Endless Summer 2".
It looks like a snowstorm but worse. The dust has a static charge and sticks to everything. It'll make you look like a snowman. It's really hard to sweep up. Later when you're trying to get a nice gloss finish the particles of dust will jump onto your wet finish and cover your board with tiny spikes.

The right way is to use a dust collection system. The Skil 100 ejects shavings upward. That lets you attach a collection hose to the middle of the tool where it won't get in the way or make it lean to one side.
Jonny uses a very flexible type of clothes dryer hose for that. He laments that this type of hose is no longer made. The hose is suspended from the ceiling right over the board. It plugs into the regular hose that came with the shopvac. The shopvac hose isn't quite strong enough and can collapse in one spot. He wrapped it with wire there to keep it open. The shopvac is an extra-quiet model.