Tactile control knobs for AN/SPA-25G indicator group consoles

The AN/SPA-25G indicator group is found on 90 percent of all Navy ships. Over the years vessels have been decommissioned (removed from active duty) some of those ships have been saved and are now museum ships. Various museum ships have a tour route through the locations containing AN/SPA-25G indicator consoles for museum visitors to view. The indicator consoles were operated in darkened locations to view the main display. Control knobs utilized tactile shapes to differentiate the knobs and function(s) such as video, brightness, radar, range, background, and status. 

Regrettably, over time, numerous tactile control knobs have been lost or removed from the shipboard museum displays. Replacement tactile control knobs have been designed and printed to replace the missing knobs to complete the correct console display configuration.