You can find out what the vertical tides are doing and how they will affect your local coastal venue by using tide timetables (tide tables), available via the internet, almanacs, and harbour offices.


你可以通过潮汐时刻表（潮汐表）了解潮汐的垂直变化情况，以及这些变化将如何影响当地 沿海区域。这类信息可通过互联⽹、航海年鉴以及港务机构获取。


In some extreme locations a strongly ebbing tide could pull a sailor out to sea, but at most coastal locations such tidal movements simply mean that the sea level rises and falls. When it does fall there may not be enough water left for you to continue sailing!


在某些极端区域，强劲的退潮可能会将船只推向外海；但在⼤多数沿海地区，这类潮汐变化 主要表现为海平⾯的升降。当海⽔下降时，⽔深可能不⾜以继续航⾏。


Horizontal Movement ⽔平运动


This effect of the tide flooding or ebbing is a parallel movement along the coastline, usually called tidal stream. As we have seen through the Rule of Twelfths, the rate of water flow varies throughout the time period between high and low water. More specific information about tidal streams is found in a tidal stream atlas.


潮汐在涨潮或退潮时，除了⽔位的升降外，还会沿着海岸线产⽣平⾏⽅向的⽔流运动,这通 常称为潮流。正如在“⼗⼆分之⼀法则”中所看到的那样，在⾼潮与低潮之间，潮流的流速会 随时间发⽣变化。更多有关潮流的详细信息，可参考潮流图集。


When choosing a new sailing location on coastal waters, knowledge of the rate and direction of the tidal stream is important as this can affect your position on the water. When out on the water, transits can be taken which help you to check your position visually. The taking of transits can also help you to understand the strength of the tidal stream.


在沿海⽔域选择新的航⾏地点时，了解潮流的流速和⽅向⾮常重要，因为它们会直接影响你 在⽔上的位置。在⽔上航⾏时，参照线是很好的辅助：可⽤于⽬测检查，确认当前位置，还 能帮助你判断潮流的强弱。


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