Notice to mariners

A Notice to Mariners (NtM) reports mariner safety matters on Northern Territory (NT) waters.

These matters include:

  • new hydrographic information
  • changes in channel depths
  • aids to navigation.

They're shared to mariners (recreational and commercial) and maritime-related organisations.

Marine operators are also required by law to report navigational hazards or dangers.

Types of notices

A notice can appear as a:

  • permanent notice - changes to information which result in a chart correction released by the Australian Hydrographic Service
  • preliminary notice (P) - a pre-emptive notification of a permanent change
  • temporary notice (T) - information valid only for a limited time.

Find notices below. They may also be published in local and state-wide print media and reproduced in the Australian Notices.

Port of Darwin local notices

NtM number and name Date published Notice type
NtM 2021-041-Diving Operations-Stokes Hill Wharf PDF (538.0 KB) 14 May 2021 Temporary
2021-040 Missing Marker Buoy HMAS Coonawarra PDF (801.5 KB) 12 May 2021 Temporary
NtM 2021-03 9- Testing of USV in Darwin Harbour PDF (607.1 KB) 11 May 2021 Temporary
NtM 2021-029- Buoy Moorings Permanently Established PDF (421.5 KB) 24 Mar 2021 Permanent
2021-002 Declared port depths PDF (534.1 KB) 18 Jan 2021 Temporary
2020-069 Additional information regarding NtM2020-063 PDF (551.6 KB) 23 Oct 2020 Temporary
2020-063 HMAS Coonawarra redevelopment program closed eaters until 30 June 2023 PDF (983.4 KB) 06 Oct 2020 Preliminary
2019-021 Scientific instrument buoys PDF (632.0 KB) 27 Mar 2019 Temporary

NT coastal notices - whole of NT waters

NtM number and name Date published Notice type
NtM 2021- 004 (T) Hydrographical Survey N E Beagle Gulf.pd PDF (1.1 MB) 27 Apr 2021 Temporary
2020-001 Ghost net reported sighting PDF (371.9 KB) 02 Jun 2020 Temporary
2019-006 Buffalo Creek Beacons PDF (554.7 KB) 20 Jun 2019 Permanent
2019-002 Medina Inlet ATONs PDF (553.2 KB) 27 Mar 2019 Permanent
2018-003 Dundee FAD deployment PDF (506.6 KB) 07 Sep 2018 Temporary


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Last updated: 04 March 2021

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