They appear to be partially blocked by "On Your Mark" anyway. Besides that, a few nights ago On Your Mark had not only all its blue decorative lights on, but had strobe lights going on its mast structure.
John, I wouldn't think that the gypsum ships would even need the range marker since they never really got in close enough to matter and the tugs nudged them into their dock.
Ben, range markers can be different colored lights, man made objects, or natural geographic features that, when aligned with each other on a vertical axis, indicate a safe course into a harbor, anchorage, marina, etc. I don't go into Bowline but I believe they use a church steeple and something else as a sort of range marker to enter Bowline safely. If those range markers start to separate from one another it means that a course correction is necessary. The range markers for Haverstraw Marina are on shore and probably a little to the right of where On Your Mark is docked.