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NAUTICAL NOTICES.

1.-ENGLAND.-Entrance to the River Thames.-New Buoy in East Swin.-With reference to Notice, see p. 1,120, vol. for 1878, an 8-foot can buoy, in Black and White Vertical Stripes, marked "West Hook Middle," has been placed about midway between the S.W. Middle and North Hook Middle Buoys, in 7 fathoms, with the following marks and bearings, viz. :— Whitaker and Buxey Beacons, in line N.W. Wly.; Brightlingsea Church Tower from No. 2 Martello Tower, on the Mound towards Brightlingsea Chapel, N. W. Wly.; S.W. Middle Buoy, S.W. by W., distant 1 miles; Swin Middle Light-vessel, W. by S. S., distant 1 miles; Whitaker Beacon, N.W. Wly., distant 11 miles; Whitaker Buoy, N.E. by N., distant 11% miles; North Hook Middle Buoy, E. by N. N., distant 1% miles. Also an 8-foot conical buoy has been substituted for the can buoy formerly at the Rough.

2.-IRELAND.-East Coast.-Intended Alteration in North Arklow Light.-During the spring of 1879, the two fixed lights now shown from North Arklow light-vessel will be discontinued, and in lieu thereof one revolving light will be exhibited, showing two flashes in quick succession, followed by an interval of forty-five seconds of darkness, the whole revolution occupying one minute. The lightvessel will be distinguished in the day-time by having one mast with a ball at the masthead, and a jigger mast. Further notice will be given.

3.-IRELAND.-S. E. Coast.-Fog Station at Tuskar Rock Lighthouse. On or about the 1st of February, 1879, a rocket fogsignal will be established at this lighthouse. The rockets will be discharged every five minutes, which, on reaching an altitude of about 400 feet, will explode with a loud report.

4.-IRELAND.-South Coast.-Cork Harbour.-Intended FogSignal at Poor Head.-To be established early in 1879, at Poor Head, 3 miles south-eastward of the entrance to Cork Harbour. It will be a siren trumpet, which, during thick and foggy weather, will give one blast of five seconds' duration every two minutes. Further notice will be given.

5.-NORTH SEA.--NETHERLANDS.-North Sea Ship Canal.Alteration in Leading Lights at Noordzee (Ymuiden) Harbour.-On or about 1st January, 1879, two lights will be exhibited from lighthouses recently erected on the south side of the canal entrance, and which, when in line, will lead in mid-channel through the outer harbour. They will be fixed white lights, elevated 169 and 136 feet respectively above high water, and visible from seaward between the bearings N.E. by N. and S.W. by S. from the distances of 19 and 18 miles. The lighthouses, constructed of iron, and circular in shape, are painted in red and white bands; they are situated westward of the sea sluices, on the south shore of the canal, and bear from each other S.E. by E. E. and N.W. by W. W., distant 612 yards. Position of low lighthouse, lat. 52° 27′ 45′′ N., long. 4° 34′ 30′′ E. On the exhibition of these lights, the temporary leading lights (red and white) will be discontinued. Variation, 161 W.

6.-NORTH SEA.—Netherlands.-Temporary Discontinuance and Intended Alteration in Egmond-Aan-Zee two lights (fixed white) are to be replaced by fixed red lights.

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7.-NORTH SEA.-NETHERLANDS.-Zuider Zee.-Harlingen.Re-exhibition of Outer Leading Light, Pollen Channel.-The outer leading light (fixed white) is now re-exhibited from a structure on the North Harbour Mole, 55 yards westward of its former position. This light, in line with the innermost or south light, leads southward of the dam, through Pollen Channel, which has been rebuoyed.

8.-NORTH SEA.-SCHLESWIG-HOLSTEIN.-East Side of Sylt Island.-Light at Munkmarsch Harbour.-In addition to the Northern leading light (fixed white), established in 1877, the Southern leading light (fixed white) is now exhibited. These lights in line lead through the channel recently made between the sand banks, to Munkmarsch harbour; they should be visible through an arc of 90°, between Lister Ley and Wester Ley, from a distance of about 6 miles.

9.-BALTIC ENTRANCE. SWEDEN. The Sound.

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Temporary Withdrawal of Svinbadarne Light-Vessel, and Alteration in FogSignal. This light-vessel has been withdrawn from her station

westward of Jungnäs shoal, and replaced by another light-vessel; and during thick and foggy weather, whilst the temporary lightvessel is in position, a bell will be rung.

10.-BALTIC.-SWEDEN.-Öland Island.—Alteration in Södra Udde Light.—This light, on the south extreme of Öland island, has been altered as follows:-It is a fixed and flashing light, showing fixed to seaward and over Kalmar sound, between the bearings of S. 11° W. and S. 16° E.; two flashes in quick succession followed by an eclipse of four seconds' duration between the bearings S. 16° E. and S. 9° E.; fixed between S. 9° E. and S. 4° W.; and a single flash of one second duration followed by an eclipse of four seconds between S. 4° W. and S. 11° W. Variation, 939 W.

11.-BALTIC.-SWEDEN.-Öland Island.- Alteration in Ispe Udde Light.—This light (fixed), on the west side of Öland Island, now shows white between the bearings N. 56° E. and N. 70° E.; red between N. 70° E. and S. 18° E.; and white between S. 18° E. and S. 333 W.

Note. It is intended at a future date, that the light shown between the bearings N. 56° E. and N. 70° E. shall be a flashing light. Variation, 930 W.

12.-BALTIC.-SWEDEN.-Kalmar Sund.-Alteration in Grimskär Light. With reference to notice in 1878, the following alteration has been made:-The light is a fixed and flashing light, showing two flashes in quick succession followed by an eclipse of four seconds' duration between the bearings N. 1° E. and N. 17° E.; fixed between N. 17° E. and N. 34° E.; and a single flash of one second duration followed by an eclipse of four seconds between N. 34° E. and N. 50° E. In the approach to Kalmar harbour from the northward, there are also shown two flashes in quick succession followed by an eclipse of four seconds' duration between the bearings S. 31° W. and S. 35° W.; a fixed light between S. 35° W. and 37° W.; a single flash of one second duration followed by an eclipse of four seconds between S. 37° W. and S. 41° W.; a fixed red light between S. 41° W. and S. 53° W.; and a fixed light between S. 53° W. (through west) and N. 1° E. Variation, 93° W.

Note. With Grimskär lighthouse bearing between N. 17° E.

and N. 34° E., at the distance of 3 cables, there is a depth of 2 fathoms; and with the lighthouse bearing between S. 35° W. and S. 37° W. at the distance of 6 cables, there are 2 fathoms water.

13.-BALTIC.-PRUSSIA.-Lubeck Bay.-Light at Buch Point.— Exhibited from a lighthouse recently erected on a conical hill about 1 miles southward of Buch point. It is a flashing light, showing a flash of about six seconds' duration every fifteen seconds; elevated 312 feet above the sea, and visible about 17 miles; a sector of red light (flashing) will be shown over the shoal ground of Wismar bay, between the bearings E. N. and N.E. E., which should be visible 14 miles. The lighthouse, 68 feet high and circular in shape, is painted red with white bands, lantern of a dark colour; with keeper's dwelling (one story) attached. Position, lat. 54° 7′ 55′′ N., long. 11° 41' 40" E. Variation, 121° W.

14.—BALTIC.-PRUSSIA.-Rugen Island.-Fog-Signal at Cape Arkona.-A siren trumpet, worked by a caloric engine, which during thick and foggy weather will give one blast of from five to six seconds' duration every minute.

15.-BALTIC.-PRUSSIA.-Fog-Signal at Danzig.-A siren apparatus has been established at the Pilot Office, Neufahrwasser, port of Danzig.

16.-GULF OF BOTHNIA.-SWEDEN.-Discontinuance of Ago Island Fog-Signal.-The fog-signal at Ago island lighthouse, approach to Hudiksvall, is discontinued.

17.-FRANCE.-West Coast.-Light on Ile aux Moutons.-On January 1, 1879, a fixed light with white, red, and green sectors, showing over various rocks, will be shown from Ile aux Moutons, one of the Glenan isles. Further particulars in next number.

18.-MEDITERRANEAN.-SPAIN.-Harbour Light on Inner Mole, Tarragona.-Provisionally exhibited on the extremity of the Inner or Transverse mole, in course of construction. It is a fixed green light, elevated 16 feet above the sea, and visible 3 miles; it is obscured between the bearings S. 344° E. and S. 50° E. This temporary light is shown from a stanchion on a platform (removed by day) and bears N. 29° E., distant 2 cables from the Eastern mole head light.

19.-MEDITERRANEAN.-SPAIN.-Grosa Island.-Bell-buoy on Laja Grosa.-The bell-buoy of Laja Grosa (a rock north-easterly from Grosa island) is anchored in 17 fathoms water, 130 feet south of the bank, and with 33 fathoms of chain.

20.-BLACK SEA.-Sevastopol Harbour.-Temporary Alteration in Cape Khersonese Light.-During repairs of the apparatus of the revolving light a fixed white light will be exhibited, elevated 108 feet above the sea, and visible 12 miles.

21.-BLACK SEA.-Kertch Strait.-Temporary Alteration in Cape Yenikale Light.-Pending the completion of the lighthouse in course of construction on Cape Panagia, eastern side of entrance to Kertch Strait, the following alteration has been made in the light exhibited at Cape Yenikale :-The light (flashing) is now visible between the bearings N.N.E. (through west) and S.S.E. Variation, 14° W.

22.-NORTH ATLANTIC OCEAN.-Floating Wreck Westward of Canary Islands.-On 26th July, 1878, the wreck of a vessel (lying bottom up and showing very little above water) was seen in lat 28° 30′ N., long 20° 40′ W. This would be in the track of shipping bound from Europe across the Equator. In this locality the drift current sets to the south-west and west at an average rate of about 8 or 10 miles in a day.

23.-INDIA. Bay of Bengal.-Burmah.-Reported Sunken Danger North West of Cheduba Island.—The following information, relative to the existence of a reported sunken danger lying about 8 miles north-westward of Beacon islet, Cheduba island, is on the authority of the Commander of the British India Steam Navigation Company's steam-vessel Avagyee, who observed heavy rollers and breakers indicative of a shoal patch, with probably only 2 or 3 fathoms at low water; lying with West point, Ramree island, bearing N. by E. E.; North-west point of Cheduba island, bearing S.E. by S. Position as given, lat. 19° 2′ N., long. 93° 21' 30" E. Variation, 24° E.

Caution.-The neighbourhood of Cheduba and Ramree islands being imperfectly known, mariners should navigate in the locality with care.

24.-INDIA.-Martaban Gulf.-Blue Lights and Maroons at

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