Proficiently Equipped

Ships can be proficiently equipped for particular tasks, allowing her crew to add their proficiency bonus to the roll or save, as long as the crewmember has at least one deployment rank. Enemy ships also have this bonus, which is incorporated in their stat blocks. The bonus is used in the rules on ability checks, saving throws, and attack rolls.

Your proficiency equipped bonus can't be added to a single die roll or other number more than once. For example, if two different rules say you can add your proficiency bonus to a Wisdom saving throw, you nevertheless add the bonus only once when you make the save.

Occasionally, your proficiency bonus might be multiplied or divided (doubled or halved, for example) before you apply it. If a circumstance suggests that your proficiency bonus applies more than once to the same roll, you still add it only once and multiply or divide it only once.

By the same token, if a feature or effect allows you to multiply your proficiency bonus when making an ability check that wouldn't normally benefit from your proficiency bonus, you still don't add the bonus to the check. For that check your proficiency bonus is 0, given the fact that multiplying 0 by any number is still 0. For instance, if you are not proficiently equipped in the Data skill, you gain no benefit from a feature that lets you double your proficiency bonus when you make Intelligence (Data) checks.

In general, you don't multiply your proficiency bonus for attack rolls or saving throws. If a feature or effect allows you to do so, these same rules apply.

Expertly Equipped

Certain features, such as Active Camouflage or a Boarding Harpoon, let your ship double its proficiency bonus with a given skill or modification, granting your ship the status of expertly equipped in that skill or modification. As usual, you can only gain expertly equipped status in a skill or modification once.

Proficiently Equipping a Ship