From the USCG:
VTS Measure is in effect from MM-171.0 to MM-172.0 AHOP, to protect persons and property from the hazards of a ship aground at Point Houmas MM-171.5 RDB.
One way traffic is required from all passing vessels. No line boats that require flanking are allowed to proceed southbound while the ship is aground at that location.
No further information at this time.

The full VTS Measure is below.

A VTS Measure is in effect from MM-171.0 to MM-172.0 AHOP, to protect persons and property from the hazards of a ship aground at Point Houmas MM-171.5 RDB.
One way traffic is required from all passing vessels. No line boats that require flanking are allowed to proceed southbound while the ship is aground at that location.

All vessels must continue to contact New Orleans Traffic on CH-05a

For further information, contract Vessel Traffic Service Lower Mississippi River at (504) 365-2514 or New Orleans Traffic on CH-12 or 5a

Tony Marinelli, Watch Supervisor
U.S. Coast Guard
Vessel Traffic Service Lower Mississippi River
200 Hendee Street, Suite 300
New Orleans, LA 70114
504-365-2514