What is the purpose of the static device #791

[cplprice]

I was curious as to the purpose of the static device #791. It has no stats except a build rate of 1 and a load cost of 1. I would understand if it was made part of a TOE in order to make the parent unit static, but there is a box to check in the Location slot for the unit to accomplish that???
Why is it included????

[Terminus]

The static device is for making units like coastal forts and other garrisons static. The checkbox is for creating static HQs.

[cplprice]

Thank you for the information sir!