35 as well as the solid walls 65 the wire mesh security screen 66 on the top of each storage unit is also illustrated in fig6 this wire mesh prevents on authorized access to the storage unit that allows the storage unit to be open for fire suppression needs in addition each storage unit such as the unit illustrated and fig4 will include a number of identity tags at locations around the unit so that not only the unit but also the orientation of the unit can be determined and tracked by the system for example an exemplary embodiment of tag placement is illustrated in fig4 a first tag 70 is placed on one end of the storage unit near a corner a second tag 71 can be placed on one side of the unit near another corner a third tag 72 may be placed at yet another corner of the unit with a fourth tag 73 placed near the fourth corner because each of these tags is coded differently the system by detecting the location of each tag can determine the orientation of the unit when it is in storage and when it is moving through the facility it is possible to determine and track the orientation and movement of each unit with a single tag however additional tag detection devices need to be deployed because the pending up on the orientation of the storage unit different sides of the unit passed by different portions of the.