SPM (Single Point Mooring) or SBM Operations - Cult of Sea
The two main types of mooring configurations for SPMs are Catenary Anchor Leg Mooring (CALM) and Single Anchor Leg Mooring (SALM). CALM holds the buoy in place by anchor chain that extends in catenaries to anchor points some distance from the buoy. The SALM system is similar, except that the SALM is anchored by a single anchor leg.