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10.27

Sector 10. Micronesia, Palau, and Guam

Fog is virtually unknown, and visibility is usually very good

except during heavy rains. It has been estimated that visibility below 1.25 miles occurs once or twice a month from July through September, and not more than once a month during the remainder of the year.

10.27

The average path of typhoon centers is N of Yap; however,

three or four per year pass close enough to affect the weather, usually from September through November. Typhoons cen- tered N of Yap cause heavy showers and increasing winds from the W. The swell is heavy from the NW, and results in a heavy confused sea.

10.27

Tides—Currents.—In the West Caroline Islands, the tidal

currents usually follow the configuration of the land and set E and W. In places where no effects of the ocean currents are felt, the W tidal current flows from LW to 2 hours after LW until the same times after HW, the E tidal current from HW to 2 hours after HW until the same time after LW. These tidal currents are weak, except in narrow channels.

10.27

Inside the lagoons, the directions of the tidal currents are

irregular. They seldom flow along the axis of the entrance channels, so that caution is required when entering and leaving. The Yap Islands lie on or near the boundary between the

10.27

North Equatorial Current and the Equatorial Countercurrent. Thus a W set should predominate N of the islands and an E set S of them. Ulithi Atoll lies near the boundary between the North Equatorial Current and the Equatorial Countercurrent. Thus the atoll receives NE currents as well as W and SW currents.

10.27

Between the Yap Islands and the Republic of Palau, the

North Equatorial Current flows from December to May. The current usually sets in a W direction at velocities of 1 knot or more. The Equatorial Countercurrent, which sets E, is usually experienced in the area from June to November.

10.28 Pikelot Island (8°05'N., 147°38'E.) is overgrown

with shrubs and several coconut palms. Reefs surround the island to a distance of 0.5 mile. Shoal patches, with depths of 9.1 to 18.3m, lie within a radius of 1 mile of the island.

A 16m detached bank lies 14 miles WNW of Pikelot. A detached shoal, about 2 miles in diameter and with a least depth of 11m, lies about 11.5 miles WNW of Pikelot. In 1954, this shoal was reported to lie about 0.8 mile S of its charted position and to have extended SW for about 4 miles.

10.28 10.28

Condor Reef (8°07'N., 147°50'E.) has a least depth of

14.6m, about 4 miles from its E end. The least depth found over the W end of the reef is 22m. Matsuye Bank, a 12.8m patch, lies about 5 miles SE of the SE end of Condor Reef. This patch and the S side of Condor Reef are marked by dis- coloration.

10.28

Tarang Reef (7°45'N., 147°41'E.), about 18 miles S of

Pikelot Island, is small in extent and has a least depth of 14.6m. A 14.6m bank lies about 4 miles NW of the reef; both are marked by discoloration.

10.28

Oraitilipu Bank (8°10'N., 147°15'E.), 21 miles W of Pikelot

Island, has a least depth of 14.6m at its SE end. The water appears blue over this bank. Banks, with depths of 7.9m, 15.8m, and 11m, have been reported 8 miles ENE, and 10 and 11 miles E, respectively.

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10.28

McLaughlin Bank (9°05'N., 148°05'E.) has a least depth of

12.8m and, like any submerged atoll, has the shallowest water on its outer rim. The bottom consists of white sand.

10.29 West Fayu Island (8°05'N., 146°44'E.), densely

wooded, stands on the NE side of West Fayu Atoll. A passage, located about 0.6 mile S of the island, is about 0.5 mile wide, but the navigable channel is greatly reduced by a shoal, with a least depth of 1.8m in the middle of the entrance.

10.29

A conspicuous stranded wreck lies on the edge of the reef,

0.8 mile W of West Fayu Island,; another is reported to lie 1.25 mile farther W. A conspicuous stranded wreck is reported (1991) to lie on the inside edge of the reef 2 miles WSW of West Fayu Island.

In 1982, the island was reported to lie nearly 1 mile WSW of its charted position.

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Several banks and shoal depths are charted or have been

reported to lie between West Fayu Island and Oraitilipu Bank, and may best be seen on the chart. A reef surrounded by break- ers was reported (1971) to lie 6 miles SE of the island, and was reported to be about 2 miles long in a NE-SW direction. Satawal (7°21'N., 147°02'E.) is a sandy and reef-fringed

10.29

island. In bad weather, there are breakers all around the island. Coconut palms, sweet potatoes, and breadfruit trees grow on the island. A flagpole and some houses stand on the island. There is a radio station on Satawal.

Anchorage.—Small ships may take anchorage, in 16.5m, on the edge of the reef, about 0.3 mile WSW of the flagpole. Caution.—Satawal Island was reported (1987) to lie about

10.29 10.29

1.75 miles NNW of its charted position. Depths of 15 and 40m have been reported to lie 13 miles and 10 miles SW, respect- ively, of Satawal Island.

10.29

Discolored water has been reported to lie 23 miles NE of

Satawal Island. An underwater seamount, with reported depths (2005) of 15 to 30m over it, is located approximately 25 miles NNE of Satawal Island and 28 miles due W of Tarang Reef. An obstruction has been reported (2005) about 26.5 miles W of Tarang Reef in position 7°44.7'N, 147°11.6'E. A depth of 15m has been reported (2005) about 25 miles W of Tarang Reef in position 7°45.1'N, 147°12.8'E. Mariners are cautioned to exer- cise special care when navigating these waters.

10.30 Lamotrek Atoll (7°30'N., 146°20'E.) has three small

wooded islets at its extremities. The atoll is reported to give a good radar return up to 18 miles. Coconut palms and breadfruit trees grow on the islets. A large area in the lagoon has been swept to 14.9m, except for a few isolated shoals.

10.30

The passage about 0.8 mile S of Pugue Islet, on the N islet of

the atoll, is the widest and best of those leading into the lagoon. A heavy sea sets in through this channel during the NE trades. A passage, about 0.2 mile wide, leads through the middle

10.30

part of the atoll’s S side. This passage is sometimes used when the NE winds are strong. The entrance is hard to identify from the offing.

10.30

Anchorage.—Anchorage may be taken within the lagoon,

off the W side of Lamotrek, affording protection from E winds. 10.31 Elato Atoll (7°27'N., 146°10'E.) consists of two

atolls. On the N atoll are four islets. Elato, flat and sandy, is located at the NE end of the atoll. The S atoll is separated from 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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