Tide (18 Hours) PDF

Dpartment of Navigation -1- Costal Navigation (3) Chapter( 1) Tide (18 hours) WK Objectives I.M.O No No...

Dpartment of Navigation -1- Costal Navigation (3) Chapter( 1) Tide (18 hours) WK Objectives I.M.O No No Chapter( 1) 1.1.2.11 Tide 1 -Introduction ------------ 2 - explains the basic theory of tides 1.1.2.11-1 3,4 - defines 'spring tides', 'neap tides', 1.1.2.11-2 'height of tide' 'high water' and 'low water', 'mean high water springs', 'mean high water neaps', 'mean low water springs', 'mean low water neaps', 'range', 'chart datum' 5 - calculates the spring and neap ranges 1.1.2.11-3 for standard and secondary ports 6,7,8 - finds the predicted time and height of 1.1.2.11-4 high and low water at standard and secondary ports. Dpartment of Navigation -2- Costal Navigation (3) Dpartment of Navigation -3- Costal Navigation (3) Chapter)1( TIDES 1 - INTRODUCTION When a navigator is preparing to take his vessel into port, one of his chief concerns is the available depth of the water at the time of arrival. In nearly every port, that depth will change from time to time as a result of a tide. fig (1) through knowledge of tidal action and how the height of tide can be predicated and calculated is an essential part for the navigator. Figure (1) that depth will change from time to time as a result of a tide. 2-Tide: The periodical vertical oscillations of the sea in response to the tide raising forces of the Moon and the Sun 3-Types of Tides: There are three type of tide: figure (2) A- Diurnal tide. B-Semidiurnal Tide: C-Mixed Tides: Figure (2) type of tide Dpartment of Navigation -4- Costal Navigation (3) A-Diurnal tide: Which happens one for each of the high water and low water figure (3) Figure (3) Diurnal tide B-Semidiurnal Tide: Which happens heights of high water and other low water during the lunar day 24 hours, 50 minutes, and it can be said that the higher of high water, as well as the low water figure (4) Figure (4) Semidiurnal Tide C-Mixed Tides: It is the most common types of generating notes a significant difference in the high water level and next high water and also for low water figure (5). Dpartment of Navigation -5- Costal Navigation (3) Figure (5) Mixed Tides 4-Tidal Stream: The periodical horizontal oscillations of the sea in response to the tide- raising forces of the Moon and Sun figure (6). Figure (6) Tidal Stream Dpartment of Navigation -6- Costal Navigation (3) Exercise (1) Put (T) for True answer and (F) for False answer: 2- Tidal Stream: The periodical horizontal oscillations of the sea in response to the tide- raising forces of the Moon and Sun ( ) 2- Depth change from time to time as a result of a tide ( ) 3-Depth change from time to time as a result of a tidal stream ( ) 4-Tide is the periodical vertical oscillations of the sea in response to the tide raising forces of the Moon and the Sun ( ) 5-Diurnal tide: Which happens one for each of the high water and low water ( ) 6- Mixed Tides: It is the most common types of generating notes a significant difference in the high water level and next high water and also for low water ( ) Choose the correct answer 1-Types of Tides: A- Diurnal tide. B-Semidiurnal Tide, Mixed Tides C- All above 2-Depth change from time to time as a result of A- Tide B Tidal stream C- All above 3-Diurnal tide: A-Which happens one for each of the high water and low water Dpartment of Navigation -7- Costal Navigation (3) B-Which happens heights of high water and other low water during the lunar day 24 hours, 50 minutes C- All above. 4-Semidiurnal Tide: A-Which happens heights of high water and other low water during the lunar day 24 hours, 50 minutes B-Which happens one for each of the high water and low water. C-(A,B correct answer) Complete the space with the suitable number: (1) Semidiurnal Tide (2) Diurnal tide (3) Interval time (4) Tidal Stream (5) Types of Tides (6) Mixed Tides (7)Available depth of the water at the time of arrival (8) Duration (9) Tide (10) sea position (……) The periodical horizontal oscillations of the sea in response to the tide- raising forces of the Moon and Sun. (…….) It is the most common types of generating notes a significant difference in the high water level and next high water and also for low water. (…….) Which happens heights of high water and other low water during the lunar day 24 hours, 50 minutes (…..…)Diurnal tide- -Semidiurnal Tide- Mixed Tides. (……..) Which happens one for each of the high water and low water. (……..) The periodical vertical oscillations of the sea in response to the tide raising forces of the Moon and the Sun Dpartment of Navigation -8- Costal Navigation (3) Complete the space with the suitable number: (1) Semidiurnal Tide (2) Diurnal tide (3) Duration (4) Tidal Stream (5) sea position (6) Mixed Tides (……..) (……..) (……..)