A few weeks ago, we performed a de-icing. After completion, the coordinator reported a 33% fluid/water mixture. Unfortunately, the ACARS reporting form only allows selecting 100/0, 75/25, 50/50, 25/75 mixtures – which are by the way those used in our hold-over-time tables. We used 50/50 to report (overrated) and 25/75 (underrated) for the HOT calculation to be on the safe side.
