ANCHORING REGULATIONS
Within the Singapore Port Limits, no vessel is to anchor in an area outside its appropriate designated anchorage. Due regard should be given to the presence of any submarine cable, pipeline, tunnel, or any other physical obstruction, before dropping the anchor, including in times of an emergency.  

Mariners are reminded, as far as practicable, not to anchor in all areas of the Traffic Separation Scheme (TSS) in the Straits of Malacca and Singapore (Rule 10(g) of the COLREGs refers), as well as between the landward limits of the TSS and approaches to the ports. Vessels entering any port in any of the littoral States are to anchor only in the anchorages designated by the respective littoral States.