Deep water allows fish enough room to swim on the flats proper. I consider moon phases essential components and predictors of depth as well as current velocity. The new and full moons give anglers spring tides, which produce higher highs and lower lows. The quarter moon creates less tidal height change and has more-tepid currents. Always consult tidal charts for each day and the target fishing area, because tides are rarely evenly distributed throughout the day. Some areas have two tides a day, some have four, and some locations, like Charleston, South Carolina, have such large tidal swings that anglers risk stranding their boat if not careful.