Tell that to a Hudson River tug boat captain. Tidal current on that river extends up to the 1st. lock almost up to Albany.
While this is true, the Hudson River is not one of the rivers mentioned by the " Secretary" in CFR 33 . Nor are any of the coastal rivers and tributaries.
I spend a considerable amount of time on the Hudson and surrounding waters.
The commercial traffic generally communicates meeting and passing arrangements via radio. ( ch 9 ) More often than not they follow the Port to Port protocol.
I have seen little evidence among the recreational vessel traffic as well as the ferry traffic in these waters that any stand-on privileges are afforded to vessels traveling with the current. While it may be prudent to do so and considered good seamanship. It would also be foolish for a skipper to assume they have stand on privileges over another vessel, that are not clearly written in the rules.