[chaindelay]  
'2019-05-17
'(utc: chains following utc instead of Loran time, discontinuous on leap seconds)

'GRI ms    'since
8000=113   '170101 (utc)
8830=25.7  '190517 -5 us/month
9930=0     '190409
7950=122   '170101 (utc)
5990=38    '181130 +1.043 ms/day ?
5960=53.8  '170101 (utc)
6000=0     '170101 (utc)