A UK marine aggregate dredger was underway in open sea while fully loaded.
A crew member was traversing from forward to aft along the port main deck when they were suddenly knocked off their feet by a large wave.
The crew member managed to grab hold of the middle bar of the ship side hand rail until the wave had passed. They regained their footing and left the main deck via the poop. The individual was uninjured by the fall/impact of wave, but was potentially suffering from shock afterwards – they showered/changed clothes to prevent hypothermia and were monitored by other crew.