Sailing Guide

Selat Siberut (W Sumatra)

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Selat Siberut (W Sumatra)

Characteristics

Description

Selat Siberut, between Pulau Bojo and Pulau Siberut, is about 21 miles wide.
Selat Siberut is the passage usually taken by vessels bound to Teluk Bayur from N.

Low-powered vessels from the Indian Ocean bound to Selat Sunda between May and september, and all vessels bound N from Selat Sunda between November and March, use this passage.

There is generally a long line of surf on the shores of the strait, particularly on its N and W portions. In the E portion, and under the Pulau Siberut shore, there is shelter from the sea which causes heavy surf on the N shore, where all the dangers lie within the 5.5m line.

Vessels approaching Selat Siberut from the W should steer to pass about 2 miles S of the W point of Pulau Tanahbala, and will sight Pulau Bodjo with its lighthouse.

The best course is to pass between Pulau Bodjo and Makasser Reef, which is clear of all danger; the reef is nearly always to be seen by the breakers.

The island should be passed at a distance of 2 miles, steering about 090°, until Tanjung Sigep bears 155°, when a course may be shaped for the desired port.

Vessels approaching Selat Siberut from the W should steer to pass about 2 miles S of the W point of Pulau Tanahbala, and will sight Pulau Bodjo with its lighthouse.

The best course is to pass between Pulau Bodjo and Makasser Reef, which is clear of all danger; the reef is nearly always to be seen by the breakers.

Winds—Weather

From November to May, when the Northeast Monsoon prevails S of the Equator, the weather is fine in Selat Siberut, with light S and SW winds. The wind is rarely stronger than force 2; in March and April strong W squalls lasting about 10 minutes may be experienced. In the other months of the monsoon rain, squalls with little wind may be expected.

If the wind shifts to S during the Southwest Monsoon period, which usually occurs between June and September, hard NW and W winds prevail in Selat Siberut, accompanied by heavy squalls.

Tides—Currents

The tidal currents are reported to be irregular.
Sometimes a W set is experienced for several successive days; at other times, an E set is experienced, with the latter being generally the weaker.

After a few days of light winds the currents turn at about HW and LW. The strongest currents are found close to the shores, where, N of Tanjung Sigep (0°54'S., 98°54'E.), the N extremity of Pulau Siberut, and between Pulau Bodjo and Pulau Tanahbala, they sometimes attain a rate of from 2 to 3 knots. In the latter vicinity the flood sets ENE and the ebb WSW.

7/02/2012
Update
Jojo
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Localisation

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Sites around Selat Siberut (W Sumatra)