Question from a "techie", not flight crew.
The map is KATL (Atlanta) from a totally unrelated thread
Are the 'ILS HOLD' markings on that map related to this story?
I.e., are they points you have to hold at on the taxyway so as not to cause interference with the ILS?
I can well understand, that something like the Hippo with its bigger RCS (radar cross section, or radio cross section if you want to be finicky), especially side-on, could cause some unforeseen problems...
CJ