an elongated missile launcher cell is structured to allow arraying into multiple - cell array . each missile launcher cell of the array includes a support structure which accommodates a canisterized missile . each cell also includes its own chimney and exhaust gas plenum , so that it may be used individually . since each cell has its own missile exhaust capability , there is no need to keep one or more bays of a missile launcher array vacant to provide for venting of exhaust gases .