.AActual depth; the true depth of water as opposed to a predicted depth. Tidal height from table added to the charted depth.Almanac; an annual publication containing Tide Tables astronomical ephemerals etc.Altitude; the angular distance of a celestial body above the viewers horizon. Anabatic Winds; caused by warm air rising up a slope to be replaced by cooler air, as opposed to kabatic, descending winds.Apparent wind; the wind as felt on board, this will be the actual wind modified b
