Not to be used for navigation
Depths in metres
Scale 1:100 000 at Lat 46°00
Depths are in metres and are reduced to Chart Datum, which is approximately the level of Lowest Astronomical Tide.
Heights are in metres. Underlined figures are drying heights above Chart Datum. Vertical clearance heights are above Highest Astronomical Tide. All other heights are above Mean High Water Springs.
Positions are referred to WGS84 Datum (see satellite-derived positions note).
Navigational marks: IALA Maritime Buoyage System - Region A (Red to port): Region В (Red to Starboard) in th Neptune Islands.
Sources: The origin, scale, date and limits of the hydrographic information used to compile the chart are shown in the Source Diagram. Depths in upright figures are from older surveys.
Positions obtained from satellite navigation systems, such as GPS, are normally referred to WGS84 Datum. Such positions can be plotted directly on this chart.
The territorial waters of Neptunia fall within the IALA Maritime Buoyage System - Region В (Red to Starboard).
Mariners are advised to exercise caution when changing IALA regions.
Mariners are advised not to anchor or trawl in the vicinity of pipelines. Gas from a damaged oil or gas pipeline could cause an explosion, loss of a vessel's buoyancy or other serious hazard. Pipelines are not always buried and may effectively reduce the charted depth by up to 2 metres. They may also span seabed undulations and cause fishing gear to become irrecoverably snagged, putting a vessel in severe danger. See Annual Notice to Mariners No 24.
Ferries enter and leave Port Fraser and Port Fitzroy harbours at frequent intervals. Mariners not entering the port are advised to maintain a distance of at least 500 metres from the entrance. Information concerning shipping movements can be obtained from Fraser-Fitzroy Ferry Company; see Admiralty List of Radio Signals.
High speed craft
High speed craft operate in the area of this chart. Mariners are advised to maintain a good lookout. Some high speed craft generate large waves, which can have a serious impact on small craft and their moorings close to the shoreline and on shallow off-lying banks.
Traffic separation schemes
All charted Traffic Separation Schemes are listed in Annual Notice to Mariners No 17; this indicates which schemes are IMO-adopted and includes other relevant information. For information about IMO mandatory and recommended routes for certain tankers and other vessels, see Admiralty Sailing Directions.
Lights (Not including the Neptune Islands)
Light stars without legends represent two fixed lights displayed vertically. They are seen as red to port and green to starboard when proceeding upriver.