(pedant mode on) ahem Gradius, I think you'll find it was 'Colln Warning' mode on Searchwater, not Anti-coll which of course were the flashing lights that the co-pilot had to remember to switch to red when it got dark.
Would hate to think all that good work by the GSU/Staneval Dry men in testing knowledge of Searchwater was wasted
But you are of course otherwise correct in your argument on all counts.