If an underwriter were to assess his premiums for the war risk insurance to merchant ships on a comprehensive or whole basis, he would have to remember that losses will occur during the three periods such as a conflict between the super-powers which is most likely to be a world war. It would scarcely be welcome to the insured shipowners whose ships trade solely between peaceful places to have their premiums increased at the time the contract is made because of the underwriters’ fear. Of the two premiums, the first premium is paid for the whole period of the insurance, which will be paid for war risk insurance cover to the insured ship throughout the world. The second premium is the additional premium (the “AWRP”, as it is often referred to) for visits which are made by the insured ship to geographically defined areas which have a high element of danger to them.