Kimberley

Mariners are advised that 32 surface and subsurface acoustic receivers are scheduled to be deployed in Robuck Bay, Broome on the 26 August 2024 and recovered 26 August 2028.

The array consists of 4 designs at the following locations:
17x receivers attached to a sacrificial mooring on seabed:

18° 18.7293 122° 2.5226
18° 17.3782 122° 5.0557
18° 16.0865 122° 6.9714
18° 12.8735 122° 7.7824
18° 8.7273 122° 7.8572
18° 7.8208 122° 14.8554
18° 7.5938 122° 17.4449
18° 6.2993 122° 15.6179
18° 5.9345 122° 20.2627
18° 6.1574 122° 15.7259
18° 4.7575 122° 7.7451
18° 3.9987 122° 18.1345
18° 3.6349 122° 15.6179
18° 1.5175 122° 7.6601
18° .8936 122° 19.3352
18° 0.2269 122° 18.0416
17° 59.6400 122° 9.2699

The above receivers are situated on the seafloor, secured to a 40kg concrete block that is buoyed 80cm above the seabed by a float collar.

4x receivers connected to Paspaley radar markers:

18° 5.8939 122° 16.6980
18° 3.6349 122°12.2640
18° 2.2440 122° 13.6879
18° 2.2330 122° 17.0699

The above receivers are secured to Paspaley Oyster lines, 1 meter from the surface buoys.

9x receivers attached to Mangrove systems:

18° 15.4681 122° 25.6680
18° 13.7222 122° 12.5916
18° 59.9580 122° 15.2732
18° 10.1939 122° 20.3639
18° 7.6983 122° 21.7602
18° 4.2293 122° 22.9800
18° 1.2552 122° 22.6752
17° 59.5222 122° 22.3602
17° 57.4552 122° 15.1388

The above receivers are secured to mangrove trees via a rope and is weighted down by a 5kg concrete block or heavy chain link. The receivers are suspended amongst the mangrove roots and contain reflective tape to prevent interference with vessels.

2x receivers attached to Intertidal rock structures:

17° 58.9000 122° 20.1833
17° 58.4166 122° 17.8499

The above receivers are secured to star pickets which are attached to intertidal rock structures. The star picket contains a crab float with reflective tape.

No vessel is to moor to or interfere with the above instruments and subsurface floats at any time.

Mariners are advised to exercise caution when transiting the area and keep clear of the above ecological monitoring equipment at all times.

Provisional recovery date: August 2028

Port users are advised that The LNG Channel Lights are no longer synchronised until further notice.LNG 6 Navigation Aid is reported to be following a random flashing pattern The Navigation Aid is positioned at approximately 20° 49.68343'S, 115° 30.65009'E . Port users are requested to update their charts and navigate with caution while transiting these areas.Port users and operators are reminded to update their records and ensure information is efficiently promulgated. A complete listing of Port of Barrow Island Marine Notices in force can be viewed and downloaded from the Port of Barrow Island website (allow for Perth business hours to process) at: http://www.chevronaustralia.com/our-businesses/barrow-island/barrow-island-port

Mariners are advised of reports of a sunken yacht within the Clerk Reef Lagoon at the Rowley Shoals Marine Park.

The yacht is said to be located nearby the moorings within the lagoon and the mast protruding the water's surface.
Mariners are advised to navigate with caution and be mindful of possible debris.

Chart reference; Aus325 - Rowley Shoals to Bedout Islet

Description: Mariners are advised that 24 x Aquatic Acoustic Telemetry Receivers & 12 x Aquatic Acoustic Transmitters have been deployed in Lagrange Bay from mid June, 2023 at the following locations:

Creeks and Channel Coordinates:

Aquatic Acoustic Receivers
18° 36.4342'S, 121° 46.9842'E
18° 36.4775'S, 121° 47.1721'E
18° 36.5730'S, 121° 46.9091'E
18° 37.0459'S, 121° 46.9509'E
18° 37.2503'S, 121° 47.0932'E
18° 38.8336'S, 121° 46.8304'E
The above acoustic receivers are attached to a screw anchor, approx.. 70 cm from the seabed. The top of each anchor is fitted with a 10 cm diam. white polystyrene float with reflective tape. A yellow EVA apple float is attached to a 50 cm rope.

Aquatic Acoustic Transmitters

18° 37.0479'S, 121° 46.6353'E
18° 37.1180'S, 121° 46.5277'E
18° 37.1705'S, 121° 46.4247'E
18° 37.2082'S, 121° 46.3319'E

The above acoustic transmitters are attached to a screw anchor. The top of each anchor is fitted with a 10 cm diam. white polystyrene float with reflective tape. A yellow EVA apple float is attached to the end of a 1m rope with the transmitter tied to the rope.

Intertidal Zone Coordinates:

Aquatic Acoustic Receivers

18° 36.9971'S, 121° 46.6913'E
18° 35.8523'S, 121° 45.8065'E
18° 37.2042'S, 121° 46.3136'E
18° 38.5297'S, 121° 46.4534'E
18° 39.4741'S, 121° 46.1915'E
18° 35.5447'S, 121° 44.9776'E
18° 36.5891'S, 121° 45.4453'E
18° 37.6554'S, 121° 45.6831'E
18° 38.7244'S, 121° 45.6541'E
18° 39.7576'S, 121° 45.2984'E

The above acoustic receivers are attached to a screw anchor, approx.. 70 cm from the seabed. The top of each anchor is fitted with a 10 cm diam. white polystyrene float with reflective tape. A yellow EVA apple float is attached to a 50 cm rope.

Aquatic Acoustic Transmitters

18° 37.6558'S, 121° 45.7399'E
18° 37.6565'S, 121° 45.8537'E
18° 37.6573'S, 121° 45.9674'E
18° 37.6580'S, 121° 46.0812'E

The above acoustic transmitters are attached to a seabed block. A 1M rope is shackled to the seabed block, with an EVA df15 float with reflective tape attached to the end.

Subtidal Zone Coordinates:

Aquatic Acoustic Receivers

18° 35.1163'S, 121° 44.0560'E
18° 36.0123'S, 121° 43.8880'E
18° 37.0037'S, 121° 44.3224'E
18° 38.0608'S, 121° 44.5612'E
18° 39.1195'S, 121° 44.4424'E
18° 36.4930'S, 121° 42.9204'E
18° 37.8093'S, 121° 43.1566'E
18° 39.1468'S, 121° 43.1640'E

The above acoustic receivers are attached to a seabed block. Three yellow subsurface df30 EVA floats are attached at approx.. 2.5 m from the seabed. One df30 EVA with reflective tape and one EVA apple floats are always at the surface.

Aquatic Acoustic Receivers

18° 39.1471'S, 121° 43.2211'E
18° 39.1480'S, 121° 43.3348'E
18° 39.1488'S, 121° 43.4484'E
18° 39.1495'S, 121° 43.5621'E

The above acoustic transmitters are attached to a seabed block. A 1M rope is shackled to the seabed block, with an EVA df15 float with reflective tape attached to the end.

Provisional recovery date: February 2026

No vessel is to moor to or interfere with the above instruments and subsurface floats at any time.

Mariners are advised to exercise caution when transiting the area and keep clear of the above ecological monitoring equipment at all times.