Hull policy clause prohibiting the insured from effecting additional insurances, including total loss of hull and machinery, other than those specified in the clause. Breach of warranty is not held covered and discharges the insurer from all liability. The clause allows the shipowner to effect policies, not exceeding 25 per cent of the insured value on disbursements, increased value and anticipated freight. The warranty prevents the shipowner from fixing a low sum insured on the hull and simultaneously effecting cheap total loss only cover. Similar provisions apply to freight policies as they follow the settlements on hull policies in the event of total loss.