Proper noun
HS3
(aeronautics, NASA, meteorology) Initialism of Hurricane and Severe Storm Sentinel. (A project launched in August 2012 to observer hurricanes)
Before using the YJM's, he used DiMarzio pickups – most notably the HS3 model and the YJM (now known as HS4) model. Source: Internet
In some early recordings, Malmsteen instead used the HS3 model in the neck and bridge positions and a disconnected stock Fender single-coil pickup in the middle. Source: Internet
Malmsteen would use an HS3 in the bridge and two YJMs in the middle and neck positions. Source: Internet