What is the AC of a sailing ship?

[Thistleknot]

What is the armor class of a sailing ship? Is it just the size modifier or what? Most ships come into the Colossal size category. So is it just AC 2 (10 -8 Colossal size mod), then, or is there some sort of "natural" armor that it might have?

Or is there even an AC to hit at all?

Does anyone have a good idea?

 

[Darkness]

According to the Attack An Object rules (PHB, p.135), an object has an AC of 10 + DexMod + SizeMod.

It also has Hardness (PHB, p.136) - a Hardness of 5 in the case of wood, that is.

 

[Crothian]

It should be easy to hit, but the hardness will allow it to ignore some damage.

 

[AuraSeer]

Are inanimate objects treated as having 0 Dex, or no score? Depending on the answer, a Colossal object either has AC 2, or AC -3. Either way, it's damn hard to miss the thing if you're standing on it.

If you're shooting from a distance, remember to apply range penalties. Also, remember that objects take half damage from ranged weapons (except siege weapons).