Use of Tide Prediction Tables

1. Use of Tide Prediction Tables

2. Enhancing Navigation Providing the Nation’s Tide and Tidal Current Predictions • 3,142 Tide Predictions Published Annually • 2,821 Tidal Current Predictions Published Annually

3. Predictions from Published Tables • East Coast of North and South America Including Greenland • West Coast of North and South America Including Hawaii • Europe and West Coast of Africa Including the Mediterranean • Central and Western Pacific Ocean and Indian Ocean

4. Table 1 Last Quarter First Quarter Feet and Centimeters Full Moon New Moon One year of predictions for Reference Stations; Three Months per page Phases of the Moon 24-Hour Clock (Military Time) Height of tides referenced to Mean Lower Low Water (MLLW) Times are Local Standard Time - NOT adjusted for Daylight Savings

5. Table 2 Secondary Stations grouped geographically Index Number Latitude/Longitude Time & Height Adjustments Reference Station Ranges and Mean Tide Level

6. Secondary Station Calculations High Low High Low Water Water Water Water Times Times Height Height Craney Island………. +0 13 -0 01 *1.04 *1.08 Adjustments Reference Station Secondary Station Low Tide 0237 0.0ft High Tide 0853 2.6ft Low Tide 1459 0.1ft High Tide 2102 2.5ft -0 01 *1.08 +0 13 *1.04 -0 01 *1.08 +0 13 *1.04 Low Tide 0236 0.0ft High Tide 0906 2.7ft Low Tide 1458 0.1ft High Tide 2115 2.6ft

7. Secondary Station Calculations: A) 0518 EST is the predicted time of Min Before Flood at Ref. Station. 05:18 EST –1 hour 18 minutes = 0400 EST. [So, 0400EST is the predicted time of Min Before Flood at the Lynnhaven Inlet Bridge.] B) 0755 EST is the predicted time of the Max Flood Current at the Ref. Station 0755 EST – 1 hour 10 minutes = 0645 EST. [So, 0645 EST is the predicted max flood current at the Lynnhaven Inlet Bridge] C) A flood current of 0.8 k is the predicted speed at the CB Entr. Ref. Station at 0755 EST 0.8 k x 0.7 factor = 0.56 knots [At 0645 EST, a 0.6 knot current is predicted at the Lynnhaven Inlet Bridge] Secondary Tidal Current Station Calculations PAGE 52 PAGE 143

8. Custom Tide Predictions • 3 Formats available for daily high/low tide predictions • International Format • Standard Page Format • Manuscript Format • 2 Options available for daily high/low tide predictions • AM/PM Time – or – 24-Hour Clock • Standard Time – or – with Daylight Saving Time adjustment

9. Station Number “90” – 1st Tide is a High Tide “91” – 1st Tide is a Low Tide Date Month Sequence number Year Times and Heights of Tides Listed Sequentially Format: 6 (i5, f4.1) International Format • A format based on recommendations by the IHO (International Hydrographic Organization) for the exchange of tide prediction data between countries. • Data is provided as columns of numbers, all fields are “fixed field width”. • One line of data per day of predictions • Each tide listed sequentially. • Only an electronic media Can be adjusted to show AM/PM Time and Daylight Saving Time.

10. Standard Page Format • Designed as a “page readable format”. • Includes headers with station name, months, days of the week, and notations as to time reference used. • Times and heights of tides listed sequentially across the page. • Provided on electronic media or printed page. Can provide times in AM/PM or 24-Hour Clock. Can be adjusted for Daylight Saving Time.

11. Manuscript Format • Same Format used in the Published Tide Tables for the daily Reference Station predictions. • 3 Months of predictions per page. • Provided as printed page or on electronic media as PostScript file or PDF file. Can be adjusted to show AM/PM Time and Daylight Saving Time.

12. Custom Tidal Current Predictions • 3 Formats available for daily high/low tide predictions • International Format • Standard Page Format • Manuscript Format • 1 Options available for daily high/low tide predictions • Standard Time – or – with Daylight Saving Time adjustment (All times are listed in 24-Hour Clock)

13. Station ID Date Slack Time, Max Time, Speed Format (i4, i4, f5.1) Month Sequence number Year International Format • A format based on recommendations by the IHO (International Hydrographic Organization) for the exchange of tide prediction data between countries. • Data is provided as columns of numbers, all fields are “fixed field width”. • One line of data per day of predictions • Each tidal current phase listed sequentially, starting with Slack. • Only an electronic media Can be adjusted for Daylight Saving Time

14. Standard Page Format • Designed as a “page readable format”. • Includes headers with station name, months, days of the week, Flood and Ebb directions, and notations as to time reference used. • Times and speeds of current listed sequentially across the page. • Provided on electronic media or printed page. Can be adjusted for Daylight Saving Time

15. Manuscript Format • Same Format used in the Published Tidal Current Tables for the daily Reference Station predictions. • 3 Months of predictions per page. • Provided as printed page or on electronic media as PostScript file or PDF file. Can be adjusted for Daylight Saving Time

16. Interval predictions • Tide and Tidal Current predictions can be generated on an interval basis. • Intervals available are: 5, 6, 10, 12, 15, 20, 30, and 60 minute. • Formats will vary dependant on the interval selected. • Tidal Reference Stations can be generated directly, all others must be inferred from high/low predictions or max/min current predictions.

17. NOAA Electronic Version Enhancement of Hard Copy Tide Tables 2011 NOAA Tide Predictions: Pass Christian Yacht Club, Mississippi Sound (Reference station: South Pass, Corrections Applied: Times: High +2 hr. 36 min., Low +2 hr. 4 min., Heights: High *1.37, Low *1.37) http://tidesandcurrents.noaa.gov/tides11/

18. NOAA Electronic Version Enhancement of Hard Copy Tide Tables

19. Graphical Tide Tables http://tidesandcurrents.noaa.gov/tide_predictions.shtml

20. Graphical Tide Tables