since Celia and others covered the rest pretty well.
Clothing/immersion gear will be a difference. Since you are often in direct contact with the water, you will probably have this on already.
Judgement of conditions and skills are something all of us need to have a steady awareness of since they vary considerably over time. What you learn about judgement for powered craft bears little resemblance to what you will learn over time/practice in your kayak. Kayaks, for example, spend lots of time in surf conditions, something most powered craft, for obvious reasons, try really hard to avoid.
Full Size Sail Rig
Reflective Hull Decals
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