iso specifications for 20 u2032 30 u2032 and 40 u2032 shipping containers this allows for easy transport of the container 400 using existing transportation systems thereby allowing the system to be readily shipped to remote areas as required thus for example when used in an emergency relief situation the container 400 can be shipped together with other emergency supplies allowing it to be provided onsite for controlling emergency supply distribution whereas a typical iso shipping container is constructed with corrugated single sheet steel and unsealed doors in one example the container 400 is constructed with exterior structural material such as steel or aluminium to form the outer wall 401 the inner wall 402 is used to retain the insulation 403 in place and can therefore be formed from a lining or the like or can alternatively also be formed from structural material such as steel although in general the inner wall is not required to provide structural strength it will be appreciated that this arrangement is particularly suited for extreme environments such as high or low temperature environments further insulation can be provided using sealed doors 105 106 and external airlock tents 405 406 this arrangement also the benefit that access to the plant compartment 103 will not greatly affect the temperature in the data compartment 104 and vice versa thereby minimising internal environmental fluctuations the exterior wall 401 may also be treated for protection against the elements before a final finish is applied this can include for example the use of camouflage paint or armour in the event that the system is used in a military context the dividing wall 102 is typically formed from a fire rated wall to thereby separate the data compartment 104 and plant compartment 103 this ensures that should a.