Yup... lao jiao I am indeed. We later converted to Sharp during reservist. ROD many moons and years liao......

BTW, are they still using the Sharp? The keys keep jammed and sometimes I had to reset the calculator and re-enter the data again. You experienced that?
Yah, agreed that feature wish, Sharp is more intelligent with the TMPC/TGPC programmed, but the HP41 is more rugged and compact.
Regarding the incident, actually it was a delta target and I think CP did had a different firing data. But FDO insisted on FDC's data coz we hardly make mistakes. But sad to say that was one of the time that we did and screw up the mission.

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Me also ROD many many moons. Is your camp beside the rail road or behind the 3rd guard?
As far as CP concern, HP41 would be the best, only need to provide no. 3 data as TMPC is calculated by the det commander themselve, as for sharp, CP need to provide all 6 det. line & elevation, time is not on our side.
No doubt by using sharp it help to reduce many forms & time but the set back is need to provide all det. firing data, worse is in old day, if Bty & FDC data not tally, decision could be make either use FDC or bty data but now to bad no firing data will be avaliable for all det. to lay the weapon.