When two blameworthy vessels collide, liability will be apportioned between them according to their degree of fault and, following the running down clause, there will be two payments, i.e. cross liability. Admiralty law prescribes a single liability settlement, a method favourable to the receiving shipowner. 2. Where two or more jointly insured parties, (marine or non-marine) have legal rights against each other, the liability cover will respond as though a separate policy had been issued to each named insured. This is made possible by a cross liabilities or severability of interest clause.