4.2 Other Key Findings
When the Master was leaving the bridge at the time while the Ship navigated near the northern
coast of the Ogijima Island, he instructed Officer A to look out alone. However, it is probable that
the instruction to make Officer A to look out alone in that situation was inappropriate, because the
Seto Inland Sea including the Harima Nada Sea where they passed through at that time is one of
the most sea-traffic congested marine areas. In addition, it was night-time. If thewatchkeeping duty
was performed by multiple persons on the Ship, it is somewhat likely that it was possible to avoid
this accident.