Priming and Lagging

The term ‘Priming and Lagging’ has been defined in two different ways.The Admiralty Manual of Navigation (1922) defines it as occurring when the resultant of the solar and lunar tides arrives before or after the lunar tide would arrive. This is here called definition A. The Admiralty Manual of Tides (1941) defines it as occurring when the interval between successive diurnal high waters is less or more than the average 24h 50m. This is here called definition B.