Not to mention Russian and Turkish warships, submarines the huge number of transits per day, the busy ferry traffic that crisscrosses between Istanbul's two sides, and the difficult-to-navigate waters.

更不用说每天都有大量俄罗斯和土耳其的军舰、潜艇过境，繁忙的渡轮交通在伊斯坦布尔两岸之间纵横交错，还有难以航行的水域。