Boat (RMDL) M5 Slides Module 5 - The IALA Buoyage System Lateral Marks Direction of Buoyage Special Mark Intersection of Channels Marking Point of Interest Change in Direction of Buoyage Safe Water Mark Caloundra Fairway Beacon Isolated Danger Marks Cardinal Marks Cardinals Around Mud Island Fines Apply Leads Bridge Lights GPS Navigation Queensland Boating Charts