For the Safety Navigation In Japanese Coastal Waters page 13/120

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- 9 -Chapter 2 Sea Conditions in sea Areas along the Coast of JapanFrom among various phenomena that occur in the seas, oce....

- 9 -Chapter 2 Sea Conditions in sea Areas along the Coast of JapanFrom among various phenomena that occur in the seas, ocean currents, waves, and sea iceare picked out as phenomena closely related to navigation and are summarized below.Oceanic phenomena have their own characteristic features and show great variations whichinclude seasonal and yearly variations. They frequently differ to a large extent from naturalphenomena. Particular care is required, therefore, when such oceanic phenomena are to beinterpreted or investigated.1. Ocean CurrentsFig. 1-10 General Situation of Ocean Currents in Japanese Waters