Its current structure in 5 cruises of 2000 has as follows. The maximum velocity of Ryukyu Current is 40 cm/s more than,15,20,20 and 55 cm/s,respectively,in January-February,April,July,October and November.

• 琉球海流结构:最大流速在5个航次中1~2；4；7；10与11月分别为40 cm/s以上；15；20；20与55 cm/s.