In the murky story of how a cache of highly explosive ammonium nitrate ended up on the Beirut waterfront, one thing is clear — no one has ever publicly come forward to claim it.

There are many unanswered questions surrounding last week's huge, deadly blast in the Lebanese capital, but ownership should be among the easiest to resolve.

Clear identification of ownership, especially of a cargo as dangerous as that carried by the Moldovan-flagged Rhosus when it sailed into Beirut seven years ago, is fundamental to shipping, the key to insuring it and settling disputes that often arise.