Online footage has emerged of a locomotive and wagon that plunged into Picton Harbour waters.

A remote-controlled shunt locomotive and a wagon with two empty tank containers fell off the wharf yesterday at the berth usually used by the Interislander ferry.

The ferry was in Wellington at the time and the shunt locomotive and wagon were being manoeuvred in the rail yard.

The wagon is partially afloat and was secured to the wharf overnight while the locomotive, weighing about 50 tonnes, is believed to be lying in about 8m of water.  

KiwiRail Chief Operating Officer Todd Moyle said “we anticipate sending divers down to determine the position of the loco, which may need to be floated to a different area to lift it out of the water.”