IMPROPER WATCHKEEPING AND WRONG COMMUNICATION :
During the voyage to Hamburg, near Bay of Biscay before English Channel around 2030 hrs big bang was heard with hard turning of ship. We saw lights of other ship through porthole for a minute and vanished in no time since fog weather & rough sea at night.
It was informed that there was a near miss / minor collision and other ship tanks were suffered damage. We were asked to check soundings of all tanks including coffer dam, etc every one hour and we found no ingress of water for 2 days.
This incident was due to the human error of Deck/Wheel house watch keeping officer and not handing over & taking over of watch properly, as well as communication fault of both ships in bad weather while altering course.