We can expect this bouy to be in the approximate area of the L course mark.
The details from the MAST notice and a link to their notice page follow.
M078-25(T) River Tamar, Beauty Point – Wave Buoy Deployment
Mariners are advised that a scientific wave-measuring buoy will be deployed off Beauty Point, near Middle Bank, at Latitude 41°9.45’S Longitude 146°50.435’E on Tuesday, 4 February 2025. The buoy will remain in position until 14 February 2025.
The buoy is yellow and will emit a flashing yellow light at night.
Mariners should navigate with caution in the area.


https://mast.tas.gov.au/notices/m078-25t-river-tamar-beauty-point-wave-buoy-deployment/