英版《潮汐表》使用方法详解

潮汐计算1.中国潮汐表1)实际水深=海图水深+潮高+(海图基准面-潮高基准面)2)利用《潮汐表》推算潮汐;A) 应用差比数进行推算附港高(低)潮时=主港高(低)潮时+高(低)潮时差附港高(低)潮高=〔主港高(低)潮高-(主港平均海面+主港季节改正数)〕×潮差比+(附港平均海面+附港季节改正数)当主附港季节改正数<10㎝,可不比进行平均海面的季节改正,而直接用差比数栏中的改正值求得附港的潮高,即附港高(低)潮高=主港高(低)潮高×潮差比+改正值B)求任意时的潮高和潮差任意时的潮高的公式:潮高改正数Δh=1/2潮差-x=1/2潮差×(1-cosθ)式中,Δh ---任意时潮高与低潮潮高之差潮差---相邻高潮潮高与低潮潮高之差θ-----任意时刻的相位角,由低潮时起算θ=t/T×180=t----任意时与低潮的时间间隔;T----落潮或涨潮的时间间隔所以:任意时的潮高=低潮潮高+潮高改正数=低潮潮高+潮差×1/2〔1-cos(t/T×180=)〕=高潮潮高-潮高改正数=高潮潮高-潮差×1/2〔1-cos(t' /T×180=)〕t'--任意时与高潮的时间间隔-任意时的潮时=高潮时-潮时改正值(t')2.英版潮汐表附港潮汐计算公式附港高(低)潮时=主港高(低)潮时+高(低)潮时差附港高(低)潮高=主港潮高-主港平均海面季节改正+潮高差(经内插)+附港平均海面季节改正3.往复流平均流速=1/2(大潮日流速+小潮日流速)若仅给出大潮日流速则小潮日流速=1/2大潮日流速平均流速=3/4大潮日流速=3/2小潮日流速注意:我国各地大潮日(农历初八,十八)及其前后两天(农历初一至初五及十六至二十),用大潮流作为当天的最大流速;在小大潮日(农历初十,二十五)及其前后两天(农历初八至十二及二十三至二十七),用小潮流作为当天的最大流速;其余日期用平均流速作为当天的最大流速.。

英版《潮汐表》一．选择题1．潮高差是：A．附港潮高与相应的主港潮高之差B．相邻高潮潮高与低潮潮高之差C．平均大潮潮高与低潮潮高之差D．平均高潮潮高与低潮潮高之差2．利用英版《潮汐表》求某附港潮汐，可首先从查该附港的编号，然后根据编号在潮时差与潮高差表中查得所需资料。

A．主港索引B．目录C．地理索引D．以上均可3．利用英版《潮汐表》推算附港潮高的公式是：A．（主港潮高-主港平均海面季节改正）⨯潮差比+附港平均海面季节改正B．主港潮高⨯潮差比-改正值C．主港潮高-主港平均海面季节改正+潮高差+附港平均海面季节改正D．主港潮高+主港平均海面季节改正+潮高差-附港平均海面季节改正4．以下哪些是英版《潮汐表》的内容？I、主港潮汐预报表；II、潮流预报表；III、格林尼治月中天时刻表；IV、差比数和潮信表；V、潮时差与潮高差表A．I、II、III B．I、II、VC．II、III、IV D．I、III、V5．英版《潮汐表》出版后补遗与勘误发表在：A．英版航海通告季度末的周版通告B．英版航海通告每年摘要中的NO.1号通告C．A和B都对D．A和B都错6．英版《潮汐表》提供了利用潮汐预报表主附港潮汐的方法和利用调和常数求潮汐的方法，两者比较：A．精度一样B．调和常数法精度高C．利用潮汐预报表的方法精度高D．对不同性质的潮汐两者精度不一样，故无法比较精度7．英版《潮汐表》有以下哪些索引？I、主港索引；II、附港索引；III、地理索引；IV、关键词索引A．I、II、III B．I、II、IVC．II、III D．I、III8．英版《潮汐表》中，从可查得主港资料所在的页码。

A．主港索引B．潮时差与潮高差表C．地理索引D．A+B9．英版《潮汐表》中调和常数表的用途是：A．结合主港潮汐预报表预报附港潮汐B．利用简化调和常数法预报主附港潮汐C．以上都对D．以上都不对10．英版潮汐表的潮时采用：A．当地标准时B．地方时C．世界时D．夏令时11．英版潮汐表中地理索引中的港名如用黑体字，表示该港是：A．潮差大的港B．重要的港C．各地区最大的港D．主港12．在利用英版《潮汐表》计算附港潮汐时，如果主、附港不在同一时区，则：A．计算附港潮时时需对潮时差进行时区修正B．计算附港潮时时直接用表列潮时差即可C．计算附港潮时时第一卷需对潮时差进行时区修正D．计算附港潮时时第一卷外的其他各卷需对潮时差进行时区修正13．在英版《潮汐表》第一卷中，每主港印有一张求任意时潮高和任意潮高的潮时的曲线图，其中由虚线构成的曲线代表，由实线构成的曲线代表。

GREATTO BE GREAT TIDE WATCHuser manualA.121/100ELB .1. A EL 32.C CCD/ti平年_pr年平.html.20002000 7 30 21 21H13.C DC D CD /204.C C; D ; C5.1 2410CC ; D; C24 0 00D , C6.23 59 59.997.1CD CD C12/24HD 12/24HD 3 /C.-10 ~+603.0③±30 /CR2016( 90mAh)4.49uA 正=255.5uA 1.96mA 7.0mAEL 5.86mA EL 10mA90% 18 ( )4 3 12 60A.Features12digits display,display“hour”,“minute”,“second”,“day”,“month”,“week”Alarm/ChimeDual timeCountdown timerStop watch with1/100-sec resolutionTide calculatorHighest tideEL backlightB.Operational Manual1.At any state,press A key EL backlight for3s.2.Normal time functionHOW TO SET THE NORMAL TIMEHIGHEST TIDE SETTING:After Setting the Normal Time fields(seconds,hour,minutes, year,month,day),YOU MUST ENTER THE EXACT TIME ATWHICH THE HIGHEST TIDE WILL OCCUR DURING THISYEAR.The“highest tide”time can be inquired from your local or national weather services.You may also find this data in theinternet by going to:http://www.co_/tide_pred.html.For example:The current year is2000and you will use this watch in Los Angeles,California,USA.The highest tideprediction for Los Angeles,California,USA during year2000isJuly30,2000at21:21H.If you are living in a country with daylight saving time,please subtract one(1)hour for the time of the highest tide.Otherwise.Please disregard this item.3.HOW TO SET THE ALARMALARM SETTINGAt Normal Alarm Display,press C key to enter the setting state. The current setting field will flash.The setting field sequence will be:HOUR and MINUTES.Press D key to adjust the value of the current setting field.Press C key to move to the next field.If no key is pressed for two(2)minutes,the system will return to normal time display.HOW TO TURN ON/OFF ALARM/CHIME FUNCTIONALARM ON/OFFCHIME ON/OFFIf the icon is displayed,the Chime feature is ON.If the icon is displayed,the Alarm is ON.At Normal Alarm Display,press D key to turn ON/OFF the Alarm and Chime.If no key is pressed for two(2)minutes,the system will return to normal time display.4.HOW TO SET DUAL TIMEDUAL TIME SETTINGAt Normal Dual Time Display,press C key to enter the setting state.The current setting field will flash.The setting field sequence will be:HOUR,and MINUTES.Press D key to adjust the value of the current setting field.Press C key to move to the next field.If no key is pressed for two(2)minutes,the system will return to normal time display.5.HOW TO SET COUNTDOWN TIMERCOUNTDOWN TIMER SETTINGAt Normal Timer Display,press C key to enter the setting state. The current setting field will flash.The setting field sequence will be:HOUR,MINUTES and SECONDS.Press D key to adjust the value of the current setting field.Press C key to move to the next field.6.HOW TO OPERATE THE STOPWATCHSTOPWATCH OPERATIONStopwatch Reseta)Press D Key to start stopwatch operation. Stopwatch is Runningb)Press D Key to pause stopwatch operation.c)Press C Key to take the current lap reading. Stopwatch is Stoppedd)Press D Key to resume stopwatch operation.e)Press C Key to reset the stopwatch.Stopwatch is Showing Lap Timef)At this condition,the Stopwatch display is frozen,but itcontinues counting in the background.g)Press C Key to resume update of display.7.HOW TO OPERATE THE TIDE CALCULATORTIDE CALCULATORYou may browse for PAST,CURRENT or FUTURE tide status using this mode.Just enter the exact time and date and thecorresponding tide status will be displayed.If you are in a country with daylight saving time(DST)and youwant to know the tide level during the DST period,pleasesubtract one(1)hour to conform to the actual standard time. HOW TO SET TO SUMMER TIMEHOW TO SET TO12/24HOUR FORMATC.SpecificationsOperational Temperature Range -10 ~60Operational Voltage 3.0VAccuracy ±30sec/monthBattery Code CR2016(capacitance:90m Ah)static average current 4.49uA(static maximum current5.5uA)Alarm average current 1.96mA Alarm maximum current7.0mAEL lighten average current 5.86mA ELlighten maximum current 10mABattery life 18month(Japan Lithium)Under the following conditions:(4backlight operation(3seconds)per day;60seconds of alarm operation per day)。