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14 Nov 44
SRD INTELLIGENCE BRANCH
SANDAKAN - PHASE I
INFM SUMMERY No 1
1. GENERAL DESCRIPTION
- This area extends alongside NE coast cf BORNEO between LABUK Bay and the KINABATANGAN River. SANDAKAN town stands in the centre of this stretch of coast near the entrance to the large inlet of SANDAKAN Hbr. The hbr has a length of 15 mls, with a maximum width of 5 mls, but the width of the entrance close to which lies the island called P. BERHALA is only l.75 mls,
- Standard Time: 8 hrs fast on GMT.
- Magnetic Variation: 2°30' E (1942)
- Maps and Charts: Aust Astronautical 1/1000.000 sheets NB 3, NB4. Admiralty Chart: No 1649.
2. OFF SHORE CONDITIONS
- Winds
NE Monsoon from Nov to APR.
SW monsoon from May to Oct.
- Tides
In the MALLAWALLE Channel the EASTgoing and WESTgoing streams run at the rate of about 2.5 knots at Springs off tho coast between MALLAWALLE Channel and SANDAKAN. No regular tidel streems is perceptible but when the NE monsoon blows steadily the re is a constant set to the NW. In SANDAKAN Harbour the tidal streams turn at the times of high and low water to the shore, the ebb attaining a maximum rate of 2 knots and the flood of 1.25 knots alongside the wharf the streams frequently flows the opposite way to the stream in the harbour,
3. DESCRIPTION of COAST
- General
From KAULA LABUT (5°56'N 117°43’E) to TANJONG PANDARAS (TANJONG PISAN) the SOUTH shore of LABUK Bay, is wild and inhospitable, offsring no suitable landing places, The coast is fringed by mangrove swamps, with wide mud flats extending offshore from KUALÁ LABUT to a point 2.5 mls EAST of SUNGEI GUM GUM. Beyond, the mud flats give way to offshore rocks and coral fronting the jungle covered coast. There is high ground near the shore at TANJONG SEMAWANG and between SUNGEI GUM GUM and TANJONG PANDARAS but even here the coastline itself is low and densely covered with mangrove, nipa palm, and jungle.
From TANJONG PANDARAS (Tg PISAN) SOUTH-EASTward, the jungle covered coast is fringed with almost unbroken coral reefs as far as the two islands, NUNUYON LAUT and NUNUYON DERAT.
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