Can't seem to find that for the Exhaust Port talent. Where in F&D is the Massive rule please?

Check the ship stat block, each one that is Massive has a special section.

Gotcha, only found one ship with it, but that explains this nicely. Thanks!

Gotcha, only found one ship with it, but that explains this nicely. Thanks!

Yeah, there's only one ship in Force and Destiny that has the Massive trait. However, said trait was introduced as part of the Age of Rebellion Beta, where there are a lot of capital ships that have it, along with the Exhaust Port talent being introduced in AoR as well as part of the Gunner specialization for the Ace career.