There are 3 types of Captain Skills: Pirates, Ships and Management.

Every time you level up, you will receive points to upgrade your skills.

If you want to level up a particular Skill, you need to unlock the skills that come before it. 

e.g.) Pirate DEF: requires Pirate ATK Lvl 3

■ How to check Captain Skills

- [Main screen] > [Tap Captain icon] > [Tap Skills]