Mean Low Water Neaps (MLWN)

Mean Low Water Neaps (MLWN) is a tidal datum representing the average lowest water level during neap tides. Neap tides occur when the gravitational pull of the sun and moon are perpendicular to each other, resulting in lower high tides and higher low tides. MLWN is used as a reference point for charting and determining water depths in maritime navigation.