Here's a selection of nav and comms equipments fitted to and cleared for use in Chinook HC Mk1.
Marconi AD120/3 VHF (am)
Plessey PTR 1751W UHF (am)
Marconi ARC 340 VHF (fm)
Marconi ARC 340 VHF (fm) Homing
Chelton 7 VHF (am) Homing
Collins 718 U4A HF
PTR1751 WWH HQ UHF
Improved UHF Secure SATCOM
Racal B6911 CCS
Decca Doppler 71
Marconi AD380 Radio Compass
AN/APN 198 Radar Altimeter
GM9 Compass
E2C Standby Compass
Decca 671 VOR/ILS
Cossor 1520 IFF/SSR
Marconi AD2770 TACAN
RNS252 Super TANS
Trimble 8000 GPS
Cossor 4760 Mk12 Mode 4 IFF
OMEGA Nav System
OMEGA Grid Mode Selector
Keystone/Cougarnet
Delco IVA Carousel INS
Care to hazard a guess at how many had full or even limited clearance for use in Mk2 as of November 1993 (CAR and RTS) and June 1994?
None.
I wonder what the safety case said about that, the positively dangerous software or the fact an essential safety modification (relating to DASH) had been outstanding for 5 years. If there was a safety case, one thing is certain. It cannot be reconciled with the RTS or the build standard of ZD576. Which is another way of saying what Haddon-Cave and the CHART report said of Nimrod and Chinook/Puma/Wessex respectively.