Us secondary u.s tide tables for subordinate station

1. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
TIDE CALCULATION
U.S TIDE TABLES
FOR
SUBORDINATE STATIONS

2. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel

3. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Tide tables for various parts of the world are published in 4
volumes by the National Ocean Service. These volumes
are:
1. Europe & West Coast of Africa including Mediterranean
Sea.
2. East Coast of North & South America including Greenland.
3. West Coast of North & South America including Hawaian
Islands.
4. Central & Western Pacific and Indian Ocean.

4. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel

5. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Each volume has 5 common tables:
• Table 1 contains a complete list of the predicted times and heights
of the tide for each day of the year at a number of places
designated as reference stations.
• Table 2 gives tidal differences and ratios which can be used to
modify the tidal information for the reference stations to make it
applicable to a relatively large number of subordinate stations.
• Table 3 provides information for finding the approximate height of
the tide at any time between high water and low water.
• Table 4 is a sunrise-sunset table at five-day intervals for various
latitudes from 76°N to 60°S (40°S in one volume).
• Table 5 provides an adjustment to convert the local mean time of
table 4 to zone or standard time. consecutive number to assist in
locating the entry in table 2.

6. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
For each subordinate station listed, the following information
is given in Table 2:
• Number. The stations are listed in geographical order and
assigned consecutive numbers. Each volume contains an
alphabetical station listing correlating the station with its
consecutive number to assist in locating the entry in table 2.
• Place. The list of places includes both subordinate and
reference stations; the latter appear in bold type.
• Position. The approximate latitude and longitude are given
to assist in locating the station. The latitude is north or
south, and the longitude east or west, depending upon the
letters (N, S, E, W) next above the entry. These may not be
the same as those at the top of the column.

7. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
• Differences. The differences are to be applied to the
predictions for the reference station, shown in capital
letters above the entry. Time and height differences are
given separately for high and low waters. Where
differences are omitted, they are either unreliable or
unknown.
• Ranges. Various ranges are given, as indicated in the
tables. In each case this is the difference in height
between high water and low water for the tides
indicated.
• Mean tide level. This is the average between mean
low and mean high water, measured from chart datum.

8. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel

9. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel

10. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Find the actual sea level, if the C.D
is 23,3 ft. at 01h:50m (LMT) on 4th.
January 2000 for Puerto Deseado.
HW Time: 03:18 LMT
LW Time: 09:10 LMT
Height of HW : 16,1 ft
Height of LW : 5,1 ft

11. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Differences of HW Time: -2h:52m
Differences of LW Time: -2h:44m
HW Time : 03h:18m - 2h:52m
: 00h:26m LMT
LW Time : 09h:10m - 2h:44m
: 06h:26m LMT

12. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Height of HW : -0,6 ft
Height of LW : +1,0 ft
Height of HW : 16,1 ft – 0,6 ft
: 15,5 ft
Height of LW : 5,1 ft + 1,0 ft
: 6,1 ft

13. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
For Puerto Deseado;
HWT : 00h:26m
LWT : 06h:26m
Height of HW :15,5 ft
Height of LW : 6,1 ft
1. Duration: HWT – LWT
06h:26m – 00h:26m = 6h:00m (Falling)
2. Range: H of HW – H of LW
15,5 – 6,1 = 9,4 ft.
3. Δt : DT – HWT
:01h:50m – 00h:26m
: 01h:24m After HW

14. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
C.D
23,3
SEA BOTTOM
LW 06:26
H of LW: 6,1
HW 00:26
Range:9,4 01h:50m
W L
HOT
CTH
H of HW: 15,5
DOW = 23,3 + 15,5 - CTH

15. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Actual range = 9,4
Δt = 1h:24m After HW
Duration = 6h:00m
CTH : 1,2 ft.
Nearest to HW
DOW : 23,3 + 15,5 – 1,2 : 37,6 ft.

16. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
27th February 2000; The sounding
taken 43,2 ft. by hand lead line at
P.M. raising time. If the C.D is 39,7
ft. Find the exact time.
HW Time: 22:52 LMT
LW Time: 16:46 LMT
Height of HW : 17,1 ft
Height of LW : 3,2 ft

17. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Differences of HW Time: -4h:58m
Differences of LW Time: -5h:04m
HW Time : 22h:52m - 4h:58m
: 17h:54m LMT
LW Time : 16h:46m - 5h:04m
: 11h:42m LMT

18. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Height of HW : *1,40 – 1,4
Height of LW : *1,40 – 1,4
Height of HW : 17,1 ft * 1,40 – 1,4
: 19,46 ≈ 19,5 ft
Height of LW : 3,2 ft * 1,40 – 1,4
: 3,08 ≈ 3,1 ft

19. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
For Bahia San Julian;
HWT : 17h:54m
LWT : 11h:42m
Height of HW :19,5 ft
Height of LW : 3,1 ft
1. Duration: HWT – LWT
17h:54m – 11h:42m =6h:12m (Raising)
2. Range: H of HW – H of LW
19,5 – 3,1 = 16,4 ft.
3. Δt: Reference time the nearest
high water time or low water time.

20. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
C.D
39,7
SEA BOTTOM
H of LW: 3,1
HW 17:54
Range:16,4
HOT
CTHH of HW: 19,5
LW 11:42
At noon
W L
43,2 = 39,7 + 3,1 + CTH; CTH = 0,4

21. DOKUZ EYLUL UNIVERSITY
SCHOOL OF MARITIME BUSINESS AND MANAGEMENT
DEPARTMENT OF DECK
E.Gürel
Actual range = 16,4
Δt = ?????????????????
Duration = 6h:12m
CTH: 0,4
Nearest to LW
DT : LWT + Δt
DT : 11h:42m + 00h:37m
DT : 12h:19m