Maritime Safety Queensland Queensland Notices to Mariners 613 (Temporary) of 2012

Brisbane pilotage area Locality: Mooloolah River entrance

Activity: hydrographic survey result, update on dredging operations and navigation warning

Refer to notice: 585 (T) of 2012

Mariners are advised that a survey of the Mooloolah River and its coastal bar on 8 June 2012 shows a least depth of 2.7 metres at LAT near the entrance channel's centreline, and some slight shoaling to a least depth of 1.9 metres at LAT at the channel's port extremity adjacent to the end of eastern breakwater.

A sand shoal to a least depth of 0.5 metres at LAT still remains to the west of the channel's starboard extremity, starting approximately 100 metres north west from the end of the western breakwater. Waves regularly break over this shoal.

The weight and chain of a temporary port buoy remains imbedded on the seabed. Its last known position was latitude 26° 40.8075' S, longitude 153° 07.8291' E.

Hard copies of this latest survey are available from Maritime Safety Queensland's Sunshine Coast office at Mooloolaba.

Mariners are also advised that the 29 metre cutter suction dredge named "Sabai" remains on stand-by, anchored within the river adjacent to the western breakwater. Two work boats named "Bulga" and "Sigma" operate as tenders to the "Sabai".

The “Sabai” will continue dredging of the sand shoal, depending on prevailing conditions. A floating pipeline extends from the end of the western breakwater to the dredge, which may affect vessel traffic. The dredge exhibits day shapes and lights as required by the Collision Regulations, and the dredge master maintains a listening watch on VHF channels 73, 12 and 16.

Mariners must carefully consider the position of the “Sabai” and its floating pipeline when navigating the river entrance. They should contact the dredge master if they have any concerns about safe passage of their vessels past the dredge. Mariners should also remain mindful of their wash and the operational speed limit of 6 knots in the vicinity of anchored vessels.

Masters of smaller recreational boats, personal water craft, and passive craft like kayaks and canoes must remain mindful of the heightened risk to larger vessels navigating the river entrance and coastal bar. Except for entering and departing the river, these smaller vessels and passive craft should keep well clear of the coastal bar and not use it for recreational purposes during a shoaling event.

Mariners must also remain mindful that coastal bars are dynamic in nature; conditions can change within days. Mariners must carefully consider the character of their vessels and the prevailing tidal and weather conditions before entering or leaving the Mooloolah River. The coastal bar must be navigated with extreme caution.

Mariners are also reminded that the Mooloolah River entrance is defined as a coastal bar. This means that each person on board an open boat less than 4.8 metres in length must now wear an appropriate life jacket or PFD while the boat is crossing the coastal bar.

Cancel notice: 585 (T) of 2012 AUS charts affected: 235 Maritime Safety Queensland charts affected: Moreton Bay – Manly to Mooloolaba (MB1) Maritime Safety Queensland Beacon to Beacon Directory 9th edition map: 71 Note: latitude and longitude positions on WGS84 horizontal datum (compatible with GDA94 datum). For further information about this notice, please contact:

The Brisbane Regional Harbour Master’s office on 07 3860 3500.

Authorised by: Director (Maritime Services)

Issued: Brisbane 12 June 2012

MOOLOOLAH RIVER

MooloolabaSpitMoolo

olaba B

each

Rock ledge

2.5m 2m

3m

Point Cartwright

MOOLOOLAH RIVERBAR

PFD

No 2VQ R

No 4Fl R 4s

No 3Fl G 4s

No 1VQ G

Least depth of 2.7 metres LAT near the entrance channel's centreline.Some slight shoaling to a least depth of 1.9 metres LAT at the channel's

port extremity adjacent to the end of the eastern breakwater.

3m

2.5m

Breakers3m

Dredge 'Saibai' in this vicinity

during survey

2.5m

2m

Last known positionof weight and chainof destroyed buoy

Mariners must carefully considerthe position of the dredge 'Saibai' and its floating pipelinewhen navigating the river entrance

3m1m

2.5m

27

Line of leads

Breakers

2.5m

5m

5m

3m

4m

19

4m

3m

2.5m

3m

4m

2.5m2.5m

A sand shoal to a least depth of 0.5 metres LAT still remains to the west of the channel's starboard

extremity, starting approximately 100 metres north west from the end of the western breakwater.

05

100 0 100metres

¯

Legend0 to1 metres1 to 2 metres2 to 2.5 metresOver 2.5 metres

Prepared 12 June 2012Maritime Safety QueenslandSpatial Services Unit

Map C5-239

Vertical datum: LAT (Lowest Astronomical Tide)Horizontal datum: GDA94Projection: UTM (MGA Zone 56)

Hydrographic survey 8 June 2012Mooloolah River Bar

© The State of Queensland(Department of Transport and Main Roads) 2012To view a copy of the licence,visithttp://creativecommons.org/licenses/by-nc-nd/3.0/au