The Thames barge exited the Medway .
The Thames barge collided with a coaster , she then hit a second vessel before being rammed amidships by the City of Johannesburg ( United Kingdom ) and sank in the Thames Estuary .
The Thames barge exited the Medway and collided with a coaster , she then hit a second vessel before being rammed amidships by the City of Johannesburg ( United Kingdom ) and sank in the Thames Estuary .