Hi Richard,

ntp2.ntp.net.nz currently has an GPS antenna fault from the storm in Auckland a few weeks back and is currently stratum 16, hence the messages. It was stratum 1 until earlier this week (Rubidium oscillator), but a attempted repair of the antenna required a reboot, thus loosing it's time. A second attempt at repair is due to happen next week.

     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*ntp1.ntp.net.nz .GPS.            1 u  719 1024  377   10.991   -0.531   0.166
 ntp2.ntp.net.nz .INIT.          16 u   96 1024    0    0.000    0.000   0.000
+ntp3.ntp.net.nz .GPS.            1 u  844 1024  377    1.450   -0.155   0.295
+ntp4.ntp.net.nz .GPS.            1 u  150 1024  377   25.749    0.469   0.149

This is noted on https://ntp.net.nz and on https://status.internetnz.net.nz

You might also want to add ntp4 to your pool.

Cheers
Josh Simpson
Systems Administrator
InternetNZ