Power: The power can restored by leaving the crown in the (I) position. Wind the crown clockwise 15-20 times until the second hand starts to move naturally. You can wind the crown until the power reserve is full where you will feel some resistance in which you should not wind further. Automatic watches will wind itself, when worn.
Water Resistance: The Atticus is 5ATM, its water resistance is best maintained when you swim in shallow water and avoid any high pressure water infiltrating your watch. eg. forcefully crashing into water with your arm or strong pressure from a water hose. Also avoid hot water environments such as saunas, hot tubs etc.
Finally, to ensure your watch remains timeless, take your watch to a trusted watch repairer for a service every 1-2 years.