M178-21 (T) D’Entrecasteaux Channel, Tower Bay – Scientific Research
Mariners are advised that scientific research will be continued at the IMAS Scientific Research Permit site at Tower Bay in the lower D’Entrecasteaux Channel. The permit area is marked with IALA special marks at the co-ordinates shown below.
| Corner marker location | Degrees, minutes decimal WGS 84 | |
| Latitude | Longitude | |
| 1. Unlit special mark | 43 23.275’S | 147 02.051’E |
| 2. Lit special mark (2nm) | 43 23.375’S | 147 02.344’E |
| 3. Lit special mark (2nm) | 43 23.458’S | 147 02.270’E |
| 4. Unlit special mark | 43 23.360’S | 147 01.982’E |
Mariners should transit with care and for the duration of the works.
M098-20 is cancelled.