It is highly recommended—and for certain vessels, essential—to use pilotage or marine advisory services (such as those from Reliance Maritime or StrasseLink ) to navigate the narrow and shallow "constraint waters". Security & Environmental Protocols Malacca Straits Advisory - reliance maritime
Mariners must strictly follow designated sea lanes and comply with international COLREGs (International Regulations for Preventing Collisions at Sea). marine advisory malacca straits