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Sector 10. Micronesia, Palau, and Guam

The entrance to Tamil Harbor is marked by lights; the chan- nel is marked by beacons.

10.38 10.38

A light is situated on Baleabaat Island; the light is a direc-

tional fixed light with white and green sectors that lead be- tween Lighted Beacon No. 1 and Lighted Beacon No. 2, mark- ing the entrance.

10.38

Pilotage.—Pilotage is available on request 24 hours but is

not compulsory. Vessels must advise ETA to Port State Control 48 hours prior to arrival. Vessels should contact Yap Port Con- trol when 10 miles from the harbor entrance. The pilot will board vessels 1 mile SE of Entrance Rock in position 9°28'N, 138°09'E.

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Regulations.—Vessels are urged to contact the local author-

ities for the latest information on regulations and arrival pro- cedures.

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Pratique should be requested at least 24 hours prior to arrival

through Yap Radio. Normally ship movements are allowed b- tween 0600 and 1800. Except in case of emergency, arrival and departure will be limited to daylight hours only.

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Signals.—The local authorities and the pilot may be con-

tacted through Yap Radio on 5205 kHz or VHF channels 16 and 22A.

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Anchorage.—The bottom S of Donitsch Island is foul.

Vessels wishing to anchor will be directed to a safe anchorage upon request to the harbormaster. The recommended anchor- age is between Donitsch Island and Biy Island, in depths of 22 to 35m, mud, however space is limited and is open to S or SE winds.

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Caution.—Vessels are urged to contact the local authorities

for the latest information on depths, regulations, etc., as dredg- ing was reported (1985) within Tamil Harbor.

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It is recommended that large vessels entering or leaving the

harbor do so at LW, under the most favorable conditions of light. At such times the reefs are clearly visible. After heavy rains the port’s waters become muddy, making it difficult to see the reefs and the channel.

It has been reported that due to the narrow and crooked entrance channel, allowance for leeway should be made in set- ting the approach course. Allowance for advance and transfer should also be made when considering course changes within the channel.

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The commercial wharf is unprotected from S and SE winds.

Due to the limited turning and anchorage room here, single screw vessels without a bow thruster may have to lie off the wharf and wait for conditions to improve before attempting to dock.

10.39 Ngulu Atoll (8°25'N., 137°30'E.) comprises a number

of low islets. Coconut palms and other trees grow on the islets. The chain of reefs on the S and W sides of the atoll protects the lagoon from winds and seas from that direction. The reefs on the E side of the atoll are submerged, so that with strong E winds a swell sets into the lagoon.

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Depths—Limitations.—Ngulu Island, on the S side of the

atoll, is densely covered with coconut palms. North Island, near the N end of the atoll, is low and covered with coconut palms. Between these two islets, the reef is in detached patches and does not break during W winds. Several passages, some of which have been swept, lead into the lagoon. In 1963, a vessel entered the lagoon through the swept passage situated about

The Republic of Palau (including Islands and Reefs to the Southwest)

10.40 The Republic of Palau consist of 243 islands, eight of

which are of significant size. All of the islands in the chain are forested. The Palau reef, partly barrier and partly fringing, encloses all the islands except two small atolls to the N and the island of Ngeaur to the SW. The barrier reef is developed on the W side and extends about 65 miles in a general SW direction from the W entrance of Kossol Passage to the island of Peleliu, where it merges with the fringing reef surrounding that island. The W limit of the reef lies about 6 miles from the nearest island. Important passages through this part of the reef lie W and NW of the N half of Babelthuap. The barrier reef to the E is poorly developed and has numerous passes. The reef extends NE from the fringing reef around Peleliu to midway along the E coast of Babelthuap, where it merges with the fringing reef along the NE coast of this island. The Palau reef encircles Kossol Passage N of Babelthuap, completing the barrier reef.

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Some of the islands appear to be of volcanic origin. They

attain a greatest height of 242m in a peak in the NW part of Babelthuap. The islands S of this island are of coral and limestone formation. Peleliu and Ngeaur are flat, but on the others there are narrow hills sloping steeply down to the sea. On all of these hilly islands there has been erosion at the water’s edge by the sea, forming grottoes.

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Winds—Weather.—The best weather prevails between

0900 and 1400. Surface winds over the sea and on the lee shores are strongest at 0300 and weakest at 1500.

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During the Northeast Monsoon (November through April),

the prevailing winds are ENE, with a frequency of 60 per cent in November, 93 per cent in January, and 82 per cent in April. The average velocity is 12 knots in December through Feb- ruary, and from 8 to 10 knots for the remainder of the period. Calms occur from 5 to 10 per cent of the time. Gales occur very rarely. Southwest winds sometimes occur in April.

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East winds continue through May and June. July through

October is characterized by general light and variable winds, with increasing frequency from the SW and W. Velocities aver- age only 6 to 8 knots. Calms occur from 10 to 15 per cent of the time. Gales are rare. In general, prevailing wind directions are ENE in May and June, SW in August and September, and evenly distributed between ENE and SW in July and October. Typhoons appear to be more intense during the spring period (March to June).

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13.8 miles NNE of Ngulu Island, and experienced no difficul- ties. In 1985, a vessel reported using the swept passage 0.5 miles NW of Ngulu Island, reporting it as easy to negotiate un- der favorable conditions. A moderate N set was experienced at the beginning of the ebb tide in the month of October.

Anchorage.—The lagoon affords unlimited, but unprotected anchorage. Anchorage can be taken N of Ngulu Island. This area is usually smooth, though a long, rolling swell may set in during SE and NE winds.

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Caution.—All navigational aids have been discontinued and

no longer exist. Vessels should use caution in approaching the atoll. Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96  |  Page 97  |  Page 98  |  Page 99  |  Page 100  |  Page 101  |  Page 102  |  Page 103  |  Page 104  |  Page 105  |  Page 106  |  Page 107  |  Page 108  |  Page 109  |  Page 110  |  Page 111  |  Page 112  |  Page 113  |  Page 114  |  Page 115  |  Page 116  |  Page 117  |  Page 118  |  Page 119  |  Page 120  |  Page 121  |  Page 122  |  Page 123  |  Page 124  |  Page 125  |  Page 126  |  Page 127  |  Page 128  |  Page 129  |  Page 130  |  Page 131  |  Page 132  |  Page 133  |  Page 134  |  Page 135  |  Page 136  |  Page 137  |  Page 138  |  Page 139  |  Page 140  |  Page 141  |  Page 142  |  Page 143  |  Page 144  |  Page 145  |  Page 146  |  Page 147  |  Page 148  |  Page 149  |  Page 150  |  Page 151  |  Page 152  |  Page 153  |  Page 154  |  Page 155  |  Page 156  |  Page 157  |  Page 158  |  Page 159  |  Page 160  |  Page 161  |  Page 162  |  Page 163  |  Page 164  |  Page 165  |  Page 166  |  Page 167  |  Page 168  |  Page 169  |  Page 170  |  Page 171  |  Page 172  |  Page 173  |  Page 174  |  Page 175  |  Page 176  |  Page 177  |  Page 178  |  Page 179  |  Page 180  |  Page 181  |  Page 182  |  Page 183  |  Page 184  |  Page 185  |  Page 186  |  Page 187  |  Page 188  |  Page 189  |  Page 190  |  Page 191  |  Page 192  |  Page 193  |  Page 194  |  Page 195  |  Page 196  |  Page 197  |  Page 198  |  Page 199  |  Page 200  |  Page 201  |  Page 202  |  Page 203  |  Page 204  |  Page 205  |  Page 206  |  Page 207  |  Page 208  |  Page 209  |  Page 210  |  Page 211  |  Page 212  |  Page 213  |  Page 214  |  Page 215  |  Page 216  |  Page 217  |  Page 218  |  Page 219  |  Page 220  |  Page 221  |  Page 222  |  Page 223  |  Page 224  |  Page 225  |  Page 226  |  Page 227  |  Page 228  |  Page 229  |  Page 230  |  Page 231  |  Page 232  |  Page 233  |  Page 234  |  Page 235  |  Page 236  |  Page 237  |  Page 238  |  Page 239  |  Page 240  |  Page 241  |  Page 242  |  Page 243  |  Page 244  |  Page 245  |  Page 246  |  Page 247  |  Page 248  |  Page 249  |  Page 250  |  Page 251  |  Page 252  |  Page 253  |  Page 254  |  Page 255  |  Page 256  |  Page 257  |  Page 258  |  Page 259  |  Page 260  |  Page 261  |  Page 262  |  Page 263  |  Page 264  |  Page 265  |  Page 266  |  Page 267  |  Page 268  |  Page 269  |  Page 270  |  Page 271  |  Page 272  |  Page 273  |  Page 274  |  Page 275  |  Page 276  |  Page 277  |  Page 278  |  Page 279  |  Page 280  |  Page 281  |  Page 282  |  Page 283  |  Page 284  |  Page 285  |  Page 286  |  Page 287  |  Page 288  |  Page 289  |  Page 290  |  Page 291  |  Page 292  |  Page 293  |  Page 294  |  Page 295  |  Page 296  |  Page 297  |  Page 298  |  Page 299  |  Page 300  |  Page 301  |  Page 302  |  Page 303  |  Page 304  |  Page 305  |  Page 306  |  Page 307  |  Page 308  |  Page 309  |  Page 310
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