See end game calculations below from a simulated attack from a Charlie II on a Belknap. This time I got lucky, but I have had cases where the ship got hit as a result of this.
07/28/1984 2:08:50 AM: Contact: VAMPIRE #981 has been type-classified as: GuidedWeapon (Classification by: USS Sterret (CG-31) [Sensor: Mk1 Eyeball] at Estimated 1 nm)
07/28/1984 2:08:51 AM: Gun (127mm/54 HECVT) is attacking SS-N-9 Siren [P-120 Malakhit] #3408 with a base-Ph of 4%. Base-Ph adjusted for distance: 4%. Sea-skimmer modifier: -11.29%. Target speed modifier: -9%. Target size modifier: -3%. Final Ph: 1%. Die Roll: 62 - MISS
07/28/1984 2:08:53 AM: Gun (127mm/54 HECVT) is attacking SS-N-9 Siren [P-120 Malakhit] #3408 with a base-Ph of 4%. Base-Ph adjusted for distance: 4%. Sea-skimmer modifier: -11.29%. Target speed modifier: -9%. Target size modifier: -3%. Final Ph: 1%. Die Roll: 98 - MISS
07/28/1984 2:08:53 AM: Decoy (Mk182 SRBOC Chaff [Seduction]; Tech: N/A) from USS Sterret (CG-31) is attempting to seduce sensor: Active Radar Seeker (Tech: Early 1970s)(Guiding weapon: SS-N-9 Siren [P-120 Malakhit] #3408). Final probability: 30%. Die Roll: 55 - FAILURE
07/28/1984 2:08:53 AM: Defensive jammer (AN/SLQ-32(V)3 [ECM]; Tech: Early 1980s) on USS Sterret (CG-31) is attempting to spoof sensor: Active Radar Seeker(Tech: Early 1970s)(Of: SS-N-9 Siren [P-120 Malakhit] #3408). Final probability: 25%. Die Roll: 24 - SUCCESS
07/28/1984 2:08:53 AM: Only 1 out of 2 weapon sensors spoofed
07/28/1984 2:08:53 AM: Weapon: SS-N-9 Siren [P-120 Malakhit] #3408 has malfunctioned.
07/28/1984 2:08:53 AM: Contact GuidedWeapon #981 has been lost.