Come prepared and don't forget:
Work gloves if you want to participate in the maneuvers.
Jacket, windbreaker or anorak depending on weather conditions.
Comfortable non-slip footwear.
Comfortable clothes to be able to move nimbly around the deck.
Biodramine if you think you might get dizzy.
Swimming suit in summer.
Important: To better enjoy your experience, I recommend that you come rested avoiding alcohol the night before. Eat a good breakfast and avoid milk. This way you will be less likely to get dizzy.