In Naruto Kaikyo the S-going(N-going) current runs during the period from about 2.9 hours after HW (LW) to about 2.9 hours after LW (HW) at Fukura.
The strongest rates are experienced in areas north of a line joining To Saki and Tobi Shima during the N-going current, and in areas south of a line joining Mago Saki and To Saki during the S-going current; the rate increases immediately after passing the respective line.
The sea is usually smooth in the main current but eddies and tidal race are generated on each side of it, the strongest in the areas east of Hadaka Shima during the S-going current and north-west of Naka Se during the N-going current.
After the current in the narrows has turned from S to N, a weak S-going current may continue to run for up to 1 hour in the area S of the narrows.
Similarly, after the current in the narrows has turned from N to S, a weak N-going current may continue to run for up to 1 hour in the area N of the narrows.
For details, consult Chart No 6228 "Charts of Tidal Currents in Naruto Kaikyo, " and Pub No 781 " Tide Tables, Vol.1".

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