Summary of recommended methods of measurement of liquid flow in tidal channels. Describes the techniques for single or continuous measurements, and considers in detail the uncertainties in tidal flow measurement. Annexes describe tidal theory and a guide to selection.Cross References:BS 3680:Part 1BS 3680:Part 3BS 3680:Part 3ABS 3680:Part 3BBS 3680:Part 3CBS 3680:Part 3DBS 3680:Part 3EBS 3680:Part 3FBS 3680:Part 3GBS 3680:Part 3HBS 3680:Part 3J BS 3680:Part 3MBS 3680:Part 8BS 3680:Part 8B BS 3680:Part 8DBS 5844