You are right, Pisces, but in the real chrono values were rounded up to 2000 metres per sea mile, probably to compensate something. Look for yourself:
I made it a bit more precise than the real thing, mainly because the SH3 chrono has only a 60 seconds sphere instead of 100 seconds. But still I left the tendency there, as it must somehow have a reason, probably experience told them it was easy to overestimate or underestimate, and they compensated it like that.:hmm: