Mares SMB Training Orange - XR Line, Surface Marker BuoySMB Training Orange XR Line by Mares Practice safe diving protocols with the SMB Training Orange XR Line by Mares. Specifically designed for training environments and controlled dives, this surface marker buoy offers high visibility and reliable deployment for divers refining their skills. High Visibility Orange Clearly marks your position during training ascents and safety stops. Durable XR Construction Built tough for repeated use in training and