Don't let seasickness cut your dive day short. Bonine's chewable, non-drowsy tablets help prevent motion sickness before it starts — just take one an hour before you board. A must-pack for liveaboards, boat dives, and any time the surface chop gets rough. Toss a box in your dive bag and stay on deck all day. Pairs well with sunscreen, a water bottle, and surface marker buoys for long drift dives.