:rofl:
Though 'technically', that would 'qualify' as a Class D, as a Class E generally has no fuel, nor, er, facilities...![]()
That "pond" might be something other than Dihydrogen Monoxide, Ammonia, or Methane...
Mercury, for example.
Or Sulfer dioxin, if it's in the -15°C range on a particularly unpleasant world.
Or lead.
A pool of anything is a good way for a ship to shed excess heat, and almost always ensures a clear approach window.