From the owner's manual:
4. On some semi-automatic pistols it is possible to lower the hammer to a
“half-cock” position. This position is the intercept notch.
WARNING: DO NOT USE THIS INTERCEPT NOTCH OR HALF COCK
POSITION AS A SAFETY DEVICE. DO NOT CARRY THE FIREARM AT
ANYTIME IN THE HALF COCK POSITION. It is not designed or suitable
for that purpose. The “half cock” or intercept notch serves only to prevent
unintended firing in case of internal malfunction or in case your thumb
slips off the hammer during manual cocking or decocking.
WARNING: TO PREVENT ACCIDENTAL DISCHARGE, it is absolutely
essential to USE THE MANUAL SAFETY. NEVER CARRY THE PISTOL
IN THE COCKED OR HALF COCKED POSITION AT ANYTIME.