This is an "all risk type" coverage designed to insure cargo while in the custody of the motor truck carrier used by the insured transportation broker. It includes warehouse-to-warehouse coverage and applies when the motor truck carrier cannot pay the shipper for its cargo loss because its insurance was cancelled, the insurance company denied the claim, or the limits of insurance were inadequate. It usually warrants that the transportation broker will keep a valid motor truck cargo policy in its office for any vehicle brokered by the insured.