Instructions and Examples 
35 
Application of tidal differences 
Example 3: 
What are the times and heights of morning high water and of the following low water at Stadersand on 9 February 2014? 
The times of spring, mean, and neap tides are given in part III, Table 2, page 203. 
According to Table 2, it is neap tide. Therefore, the neap tide values in the table of tidal differences (Part II) are used in 
the computation. 
No. 
Place 
HW time 
HW height 
LW time 
LW height 
Predictions 
Part I, page 30 
506 
Cuxhaven 
07 57 
3.2m 
14 38 
0.8m 
Differences 
Part II, page 181 
709 
Stadersand 
+2 h 43 min 
+0.2 m 
+2h 53min 
-0.1 m 
Result 
709 
Stadersand 
10 40 
3.4 m 
17 31 
0.7 m 
The computed times of high and low water are expressed in UTC +1 h 00min, the high and low water heights are referred 
to Chart Datum. 
The water depth is obtained by adding these values to the charted depths (see graph on page 9*). 
Correction of time differences for semi-monthly inequality 
Where it is advisable to correct the tidal time 
difference for a subordinate station as well be 
cause it Is not constant but varies significantly with 
the changing phase of the moon, a letter/number 
combination Is shown behind the time difference 
In Part II. The letter refers to the line in the upper 
part of Table 5, which has to be entered with the 
predicted time of high or low water at the reference 
station, rounded to the full or half hour (no inter 
polation). In the column so found, go down to the 
line with the number equal to the number of the 
letter-number combination, found In the lower part 
of Table 5. There you will find the correction to be 
added to the time difference for calculating the time 
of high or low water at the subordinate station. 
Example 4: 
What are the times and heights of morning high water and of the following low water at Dundee on 23 April 2014? 
The times of spring, mean, and neap tides are given in Part III, Table 2, page 203. 
According to Table 2, it is neap tide. Therefore, the neap tide values in the table of tidal differences (Part II) have to be used 
in the computation. 
Refer to A1 and H4 in Table 5 for the time differences at Dundee. Seek the HW and LW times at the reference station 
Aberdeen in Table 5, page 205. 
No. 
Place 
HW time 
HW height 
LW time 
LW height 
Predictions 
Part I, page 126 
1252 
Aberdeen 
07 30 
3.6m 
13 59 
1.2m 
Differences 
Part II, page 191 
1247 
Dundee 
+1 h 30 min 
+0.9m 
+1 h 20min 
+0.4 m 
Math, fine-tuning 
Part III, Table 5, page 205 
1247 
Dundee 
-Oh 07min A1 
Oh 22min H4 
- 
Result 
1247 
Dundee 
08 53 
4.5 m 
14 57 
1.6 m 
The computed times of high and low water for Dundee are expressed in UTC according to Part II, the high and low water 
heights are referred to Chart Datum.