Comment on “Ship's Weaponry”

Some q's:

I know you don't use regular cannons and firearms because magic is hell for a store of gunpowder, but what about the possibility of iron or stone balls with a bit of powder in the middle and a short fuse to get explosive ordnance for one's catapults?

And that might mean adding a result to the hit table where the ball lodges somewhere in the enemy ship and then goes off.

Any thoughts on magical projectiles? does your world have Greek fire?

Given a ship that's been hit by flaming arrows/ballista bolts, how does the fire spread? I remember learning from your blog that you can easily prevent wooden structure fires by coating the wood in, I think it was pitch and earth, so maybe the ship might not burn at all. Maybe that only applies to land structures and you have to do something different or are out of luck when it comes to sea vessels.