INTERTANKO, ICS and BIMCO have issued guidance on maritime security in the southern Red Sea and Bab al-Mandeb, providing practical support on dealing with a wide range of threats arising as a result of the conflict in Yemen in addition to the familiar threat of piracy. It stresses the importance of using the Maritime Security Transit Corridor, registration with MSCHOA and reporting to UKMTO, as well as reviewing and updating risk assessments and plans to include these new threats. The guidance also includes advice specific to identified threat types such as waterborne improvised explosive devices and is to be read in conjunction with the guidance provided in BMP 4.