The APEX SAI 33-W3 is a standalone indicator for use with the APEX HES-W3 wireless anti-two block (A2B) switches and APEX WSS-W3 wireless windspeed sensor. Up to two A2B switches and one windspeed sensor can be connected to a single APEX SAI 33-W3 indicator. The indicator can be configured to trigger a digital output when a hoist limit has been reached. Additionally, the A2B status and windspeed are shown on a graphical display. Configuration is done via user-interface on the indicator.