The banks at the northern entrance to Moreton Bay are constantly shifting, and the maintenance of the necessary lights and buoys to enable vessels to enter and clear the port in safety is a source of continual anxiety. The floating beacon, which had broken adrift during the month of February, disappeared altogether on the 10th March; and although diligently searched for, no trace of her has been discovered. Two valuable buoys disappeared from the outer banks about the same time. The floating beacon has been replaced by a new second-class (Trinity pattern) steel conical buoy, surmounted with a staff and cage, the top of which is 12 feet above the water, forming a most conspicuous object. New buoys have been moored in the positions of those lost. No. 1 cutting, Hamilton Reach, has now a depth of 17 feet at low water, spring tides; and the entrance to the bar cutting is being dredged to a similar depth. The increased depth of water in these cuttings is of considerable importance to vessels of heavy draught. A depth of 15 feet at low water, spring tides, is fully maintained in the other cuttings, but there are several shallow places in the town reaches of the river which require attention. The more recent gales and floods do not appear to have injuriously affected the dredged cuttings of the Brisbane River. Several new beacons have been erected to replace those blown down or found defective; and, to render them more conspicuous, heads have been placed on some of the beacons marking the bar cutting. Beyond some slight repairs, now being effected, all the sea and river marks for the navigation of this port are in good order, and the various buildings are not likely to require any extensive repairs for some time. The apparatus at the various lighthouses in Moreton Bay are in good order, with the exception of the reflectors at Cape Moreton, which will shortly require re-silvering. This work can be done locally. The sea-pilot steamer "Advance" continues to do her work satisfactorily, and is most usefully employed at her present station. She is only used for towing in cases of emergency, so that her earnings in that respect are very limited. The "Laura" is a most useful vessel, and is kept fully employed performing the various duties of the Department. She is, however, seventeen years old, and her hull shows signs of weakness, although her engines and boiler are in good order. The "Pippo" requires a new boiler and certain repairs to her hull. To efficiently carry out the work of the Department at this port, I find a third steamer indispensable, as the "Advance" must be kept at her station, and it is impossible for the "Laura" to successfully perform all the other work of the Department; and should either break down, a third steamer would be necessary as a relieving vessel.