TIDAL CONSTANTS

FOR VARIOUS BRITISH, IRISH, AND EUROPEAN PORTS.

By applying the Tidal Constant of the place, according to its sign (+ add, sub.), to the time of high water on the given day at the port of reference, you have the time of high water at the place sought.

CONSTANT.

Bristol & King Road .. +0 19 Weston-s.-Mare

Cape Kefken-Kirpen Islet

Roumelia-Cape Emineh
various places.

NORTH ATLANTIC-Azores-St. Michael
-Ponta Delgada

AFRICA-East Coast-Zanzibar

List of lighthouses in course of con

struction.

New breakwater

lights.

A third light.

Alteration of light.

Alteration of light.

New lights.

Proposed new light.

and proposed

Lights to be shortly exhibited.

Destruction of light at breakwater.

Prohibited anchorage.

Position and other particulars.

Discovery of sunken rock.

New light on jetty.

New light.

Information respecting the bar and

harbour.

Alteration of buoyage.

83 NORTH ATLANTIC-Bermuda-St. David Light established.

Island

NAUTICAL NOTICES.

34.-ENGLAND.-East Coast.-Thames River Entrance.-North Foreland Light—Intended Alteration in Character.-In May, 1880, the light will be altered to an occulting light, suddenly eclipsed once every half-minute for an interval of five seconds, and then, as suddenly, re-appearing with full power. Further notice will be given.

35.-ENGLAND.-The Downs.-Alteration in Character of the N.E. Goodwin Buoy.-This is now one of Courtenay's Automatic Buoys; position as heretofore.

36.-ENGLAND.-South Coast.-Plymouth Sound.-Plymouth Breakwater Light.-Intended Alteration in Colours and Character. -In May, 1880, the colour will be changed from red to white seaward, and from white to red over the anchorage-thus, showing

white between the bearings W. by N. N. and S.W. W. on a line with the Melampus buoy, and red over the anchorage. The character will be changed from fixed to occulting, whereby the light will be suddenly eclipsed once every half-minute for an interval of three seconds, and then, as suddenly, re-appearing with full power. Further notice will be given.

:

37.-IRELAND.-South Coast.-Queenstown Harbour.-Particulars of Buoyage. The following particulars have been issued :— HARBOUR ROCK EAST BUOY is conical, surmounted by a cage, chequered red and white, and marked 1 on four sides.

HARBOUR ROCK WEST BUOY is conical, chequered black and white, but without cage or number.

TURBOT BANK EAST BUOY is conical, surmounted by a cage, painted red and white in vertical stripes, and marked 2 on four sides.

TURBOT BANK WEST BUOY is conical, painted black and white in vertical stripes, but without cage or number.

WITHIN THE HARBOUR, the western banks are marked by conical buoys, painted red, and marked on four sides from 3 to 8 in white figures, 16 inches long. Nos. 9 and 10 are can buoys floating on their sides, painted red and marked in white. There is no No. 11. The buoys marking the eastern banks are conical, painted black, and marked 12 to 17 in white figures on four sides. The fairway buoys are conical, painted black with white tops, and marked on. two sides F 1 to F 8.

The five following buoys have been replaced in their proper positions :

No. 6 RED BUOY now lies with Black rock perch, S.E. by E. E., distant 74 cables.

OUTER SPIT BUOY, No. 8, now lies with Spit bank lighthouse, W.N.W., distant 2 cables.

FAIRWAY BUOY, No. 1, now lies with Black rock perch, S.E. E., distant 3 cables.

FAIRWAY BUOY, No. 2, now lies with Black rock perch, S. W., distant 6 cables.

FAIRWAY BUOY, No. 3, now lies with Spit bank lighthouse, W. by N. N., distant 4 cables.

BAR ROCK BUOY is a large cask buoy, painted red and white in stripes, and marked Bar Rock.

INNER SPIT BUOY and the Buoy between Spit bank lighthouse and Middle spit buoy (No. 9) are can buoys floating with the flat tops nearly upright, painted red, and marked S 2, S 3.

The buoy off Copper point (north-eastward of fairway buoy, No. 4) is a can buoy floating upright, painted black and marked C 4.

The buoy off White point is a can buoy floating upright, painted black, and marked W 5.

The buoy off Shawn-more rocks is a can buoy floating upright, painted black, and marked S 6.

The fairway buoy off Monkstown has been removed. Variation, 23° W.

38. NORTH SEA.-Jade River.-Williamshaven.-Light near Torpedo Harbour.-On the east side of entrance to the Torpedo harbour, about 220 yards westward of the south mole head, at Williamshaven. It is a fixed white light, elevated 13 feet above high water, and visible between the bearings N. 844° W. (through north) and N. 80° E., from a distance of 3 miles.

Note. This light is distinguished from the white lights at the harbour entrance and canals by being of less elevation.

39.-NORTH SEA.-Maas River.-Bokke Gat.-(1.) Position of Outer Light-Vessel.-Now moored on the north side of the fairway, close southward of Black buoy, No. 3, in 18 feet water. It is a fixed white light, elevated 16 feet above the sea, and visible from a distance of 9 miles. Position, lat. 51° 52′ 5′′ N., long. 8° 58′ 0" E.

(2.) Position of Inner Light-Vessel.-The Inner light-vessel of the Bokke gat is now moored in 23 feet water, on the northern side of the fairway, near the junction of Bokke and Noorder gats, taking the position of the Red buoy, which has been removedand northward of the position of Noorder Pampus light-vessel, which has been withdrawn. It is a fixed white light, elevated 16 feet above the sea, and visible from a distance of 9 miles. The light-vessel, painted red, has one mast. Position, lat. 51° 51′ 50′′ N., long. 4° 1' 25" E.