I tried to make 1x7 TNT cannons and noticed 3 bugs:

• Activated TNT are stuck in the blocks of the cannon walls, prevented from moving
• Activated TNT are not carried by water flow
• Activated TNT follows world orientation instead of ship orientation. Sometimes they go through blocks exploding everything, by getting out of the water.

Mod version: Eureka! Airships! [Fabric 1.18.2] v1.1.0-beta2

Used with mods:

• valkyrienskies-118-fabric-2.1.0-beta1+0c28d02ed5
• Mods from: Fabulously Optimized 3.14.1 for 1.18.2 (CurseForge)

Tnt cannons are not supported and won’t be in their current state- that’s something that’ll have to be done via either a custom type of tnt or some jank with making it a shipyard entity.

known and not really a bug, vanilla tnt can't rotate. much debate about how to solve this problem