[FIG(quote)[
[FIGCAPTION[
[1] ([TIME[2017-10-27 12:50:23 +09:00]])
<http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.558.2452&rep=rep1&type=pdf>
]FIGCAPTION]

>  LDC messages have been defined that communicate time-of-day,
> leap second information, differential corrections and LORAN-C network health and status information to
> users [8]. Time-of-day is calculated by propagating a count of LORAN message repetition intervals (MRI)
> that have occurred since the LORAN-C epoch (January 1, 1958) and applying the leap second information.
> The MRI count and the leap second information are provided in the time message via the LDC.

]FIG]


[FIG(quote)[
[FIGCAPTION[
[2] ([TIME[2017-10-27 12:55:25 +09:00]])
<https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19940026139.pdf>
]FIGCAPTION]

> s. The epoch for steering and time
> of coincidence (TOC) for the Loran-C chains had been previously defined to occur at 00hrs
> 00min 00sees on January 1, 1958[Sl.

]FIG]