RIYADH: Seabed security and the threats to supply chains will be among the key topics on the agenda at the fourth Saudi International Maritime Forum to be held in Riyadh in November. Hosted by the Royal Saudi Navy, under the patronage of Defense Minister Prince Khalid bin Salman, the event will bring together key figures from the worlds of government and the military as well as decision makers and stakeholders from the defense, maritime, energy, logistics, communications and technology sectors.