One of the most dangerous aspects is the constant flow of cross-traffic—ferries crossing between Indonesia, Singapore, and Malaysia that intersect the main TSS.
The region is prone to "Sumatras"—sudden, violent thunderstorms with heavy rain that can reduce visibility to near zero in minutes. passage planning guide malacca and singapore straits pdf
The SOMS is governed by a strict set of rules primarily managed by the littoral states: Malaysia, Singapore, and Indonesia. One of the most dangerous aspects is the
The entire length of the straits is governed by an IMO-adopted TSS. It is mandatory for vessels to follow the designated lanes. passage planning guide malacca and singapore straits pdf
Under IMO Resolution MSC.73(69), vessels over 300 GT or 50 meters in length must report to the relevant Vessel Traffic Services (VTS) when entering the reporting area.