A NAABSA berth is a berth at which a ship may ground in safety at low water.
The bottom at such berths is usually soft mud. The berth operator should have a system for ensuring that vessels using the berth can do so without suffering damage. A NAABSA port is a port in which ships at all berths may lie aground in safety at low water.
An example is Buenaventura, Colombia. The shipmaster should check with the port agent regarding the maximum draught permitted.