Kimberley notices

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.