The China Sea directory - Sabrizain.org

CHAP. T.] KTJIPBB, 1SLA.ND.—LEIDEN ISLAND. 285
Ayer rock of 2^ fathoms, lies W. ^ N. distant 3^ cables from the
north-west point of Hoorn island. Its west side is marked by a black
beacon buoy.
Haarlem island (Ayer KecMl), lies 14 miles north-westward
of Hoorn island. It is 1^ cables in extent, covered with trees, and
encircled by a reef, which is steep- to, extending (as is the case with all
these islands, farthest from the east sides) to about one cable. A patch of
3^ fathoms lies 1-^ cables north-east of the island.
Mounikeudam reef is about 2 cables in extent, and steep-to, with
a patch of sand which dries at low water. It lies with the centre of
Haarlem island bearing W. | N. distant one mile. A white beacon buoy
marks its north-east side.
NORTHERN APPROACH.—Edam island (Damar
Besar), the largest island in the bay, lies between the outer channel
route from the westward, and the approach to Batavia from northward and
eastward. It is about 3^ cables in diameter, covered with tall trees, and
encircled by a reef, which on the north and east sides extend to the distance
of one cable ; near the edge of the reef are depths of 14 to 20 fathoms. See
lights.
Edam reef, about 2 cables in diameter, and with a sand bank dry at
low water on its southern part, is steep- to, with 16 to 18 fathoms at a short
distance. The sand bank lies with Edam lighthouse bearing S. ^ W.,
distant 6 cables. A beacon buoy, with black and white rings lies on the
north side of the reef.
Kroya reef or Nassau bank
is about i^ cables in extent, with
a depth of 1;| fathoms on the shoalest ledge, 3 to 4 fathoms around,
and 16 to 17 fathoms at a short • distance. It lies with Edam lighthouse
bearing S. | E. distant 8 J miles, and South Watcher about N.W. \ W.
distant about 9 miles. A patch of 6 fathoms lies 2\ miles S.W. by W. of
it, but no other patches are known of in this locality.
Clearing Mark.—The whole of Alkmaar island open eastward or
westward of Edam islands leads clear of Kroya reef.
Alkmaar island (Damar Kechil), lies i^ miles southward of
Edam island. It is about 260 yards in length, covered with trees, and
encircled by a reef which on its north-east side extends to the distance of
one cable, with a depth of 13 fathoms close-to.
Enkhuizen island (Nyamuk Kechil), is similar to Alkmaar
island ; the encircling reef extends about 1;^ cables northward of it, with
about 11 fathoms close- to.
Leiden island (Nyamuk Besar), lying i^ miles south-eastward
of Enkhuizen, is about 450 yards in length, covered with bushes, and
encircled by a reef which extends one cable to the south-westward, and
2^ cables eastward of it. A rock of 1| fathoms '(Amstel shoal) lies just