Humming,
If your suggestion is true....that the ETAP being "large" prevents a mirror image being seen as it reflects off the water....how can we get those wonderful photos of Mount Adams reflected off Takalak Lake just north of Babyshoe Pass in Washington State? The mountain is just over 12.000 high.
If you can see a complete mirror image of the stars and Moon it follows the platforms/rigs can be reflected as well. It is most confusing to look out and see stars below you.....and to look out while in a turn....see two platforms growing from a common point.