Cannoneer

Whether ship-bound of on the fields, your expertise with cannons make you a force to be reckoned with. You gain the following when using cannons and other siege weapons that similarly require several actions to load, aim and fire, such as a mangonel. 

• When taking the 'Fire' action, you may add your proficiency bonus to the roll.
• You can take the 'Aim' action as a bonus action.
• You can use you bonus action to give yourself advantage on the next 'Fire' action you take on this turn.