Based on the face that each ship mat only comes with one of each action, I assume you can't plan multiple actions of the same type. But is there a logical reason for this? If there are multiple fires on your ship, why couldn't you assign several portions of your crew to extinguishing those fires?

I played a game recently where my ship was literally sinking, but I was only using half my crew actions, since my guns were loaded and there were no other ships in range. It was a little frustrating imagining half my crew standing idle, watching as the other half feverishly attempted to pump the rising flood waters and repair one of two gaping holes in the hull.