The latest OPS Alert from the OPS Group mentions a new type of spoofing around LLBG FIR with a few reports from crews. One of them reports IRS affected .
Crew says: “Lots of jamming as usual. Spoofing was new for us. All systems including IRS were confused about location. All VMC. HDG and vectors to final from ATC.”
How come IRS can be affected by GPS Jamming/spoofing ? I thought IRS systems were totally independent from GNSS sources.