NOTICE TO MARINERS.

MIDDLE CHANNEL—MORETON BAY.

IN furtherance of a Notice, issued on the 16th ultimo from this Office, relative to the growth in the Middle Channel of a knoll, having on it only ten feet of water at low-water.—Notice is hereby given, that on Monday, the 13th instant, and until further notice, a Green Light will, by order of the Marine Board, be exhibited from the Comboyuro Point Lighthouse, and will be visible, through about half a mile of that portion of the course through the Middle Channel where the Comboyuro Point Light is now obscured. The Green Light will point out when the knoll has been passed, and when the change of course, referred to in the Notice of the 16th ultimo, is to take place. A Red Buoy will, as soon as practicable, be placed to the westward of the knoll.

DIRECTIONS.

Vessels entering Moreton Bay by night, after sighting the Red Light at Comboyuro Point, should steer with that light in sight so as to bring on it the Cape Moreton Light open to the southward of the Yellow Patch Light—a space equal to one-half the difference in height between the two lights; then steer to the westward, keeping the lights in this position, until the Red Light is obscured and the Green Light becomes visible; then haul to the N.W. by Westward, making due allowance for tide, and reverse the position of the lights—keeping the Cape Moreton Light open to the Northward of the Yellow Patch Light—a space equal to one-half the difference in height of the two lights. Keep the Lights in this position until the Green Light is obscured, and the Comboyuro Point Light opens out as a bright white Light, when vessels may proceed up the Bay as usual.

By Day.—Before rounding the Outer Middle Channel Buoy and crossing the East Banks, vessels should bring the Cape Moreton Lighthouse open to the southward of the Yellow Patch Lighthouse as by the above directions, and keep them in the same position until abreast the Red Buoy to the westward of the knoll; a N. W. by W. course should then be steered, making due allowance for tide, until the relative positions of the lighthouses are reversed, and the Inner Middle Channel Buoy is passed, when the usual directions for proceeding up the Bay are to be attended to.

By following these directions, the East Banks will be crossed in not less than three fathoms at low water.

Vessels can pass in the same depth of water to the northward of the knoll and the line of lights, by crossing the East Banks with the Cape Moreton Lighthouse in line with a roadway that may be seen on the western slope of the Lighthouse Hill.

G. P. HEATH, Lieut. R.N.,
Portmaster.
Port Office, 3rd May, 1867.

NOTICE TO MARINERS.

MORETON BAY.—MIDDLE CHANNEL.

IN consequence of the growths of the East Banks to the southward, masters of vessels using the Middle Channel are cautioned that by keeping the Cape Moreton and Yellow Patch Lights in one, a vessel will pass over the tail of the bank on the north side of the channel, in ten feet at low water.

When crossing the East Banks, the Cape Moreton Lighthouse must therefore be kept slightly open to the southward of the Yellow Patch Light, in order to carry the deepest water over the banks. After crossing the East Banks the Lights should be again brought in line, and the Lighthouse brought to the northward of the Yellow Patch Light before rounding the Inner Middle Channel buoy.

G. H. HEATH, Lieut. R.N.,
Portmaster.
Port Office, April 16th, 1867.

THE following remarks respecting the entrance to the Albert River—which have been compiled from a report furnished by the Harbor Master at that port, and from other sources—are published for general information:

When making the Albert from the offing, the position of the entrance to the river is shown by three clumps of high trees; the easternmost of which—a clump of withered mangroves—is the west bush of Captain Stokes’ chart, the other two are the high trees of Flinders. The coast line to the west of the mouth of the river is covered with mangrove, while the eastern shore is remarkable for being without mangrove, either on the beach or near the sandhills at the back.

The bar (which is apparently dry at low water) is one mile inside the one fathom line on Captain Stokes’ chart, and is four miles from Kangaroo Point, on the east side of the mouth of the river. From the bar, Kangaroo Point bears S. by W. ½ W., and the high trees of Flinders S. W. ½ S.