The bosun, with the assistance of a deck cadet and five seamen, had just completed changing the cargo wire on a deck crane. They had worked continuously from the morning, taking only a short break for lunch. By the time the job was finished, the sun had set and it was getting dark. To ensure that the wires were running freely, the bosun stood on a small platform on the top of the crane cab and directed the deck cadet to operate the crane.
A cargo vessel berthed during the evening and began discharging steel cargo alongside a wharf. According to the discharging plan, it was intended to discharge cargo from hold nos. 2, 4 and 6 initially. During this sequence, sea water ballast was to be pumped into Nos. 1, 4 and 6 (port and starboard) wing tanks. At times, due to the uneven distribution of cargo in the holds, the vessel took a list to one side, and the ballast tank valves were appropriately controlled to keep the ship close to upright.