Arrived to see H1's ISC LOCK at ADS TO CAMERAS, but no signals on the front ndscope and no DARM line on DARM FOM.  SUS  Violin screen looked like everyone was OFF or not damping.   Eventually, the telltasign was MC Trans was flashing (so IMC was NOT locked) and MC REFL was really bright (with OPS Overview saying the PSL was at ~61W.

OK, here's a rough timeline for last night (used the handy "guardctrl log" command line command which Camilla was able to help me find; I also attached the guardtrl log for all notes for the minute around the lockloss):

• 537utc (1037pmlocal):  ISC_LOCK at ADS TO CAMERAS
• 0718 Verbal Alarms:  "H1 Assistance Required"
  • Not really sure what this was about....I'm guessing its related to Automatic operations because H1 MANAGER guardian was STALLED and mentioned the "assistance required"
• 09:10:45utc On Verbal Alarms we get saturations for many SUS and PDs
  • (this is probably when the lockloss occured)
  • Fast Shutter closes (Camilla mentioned this, so I immediately checked that.)
  • IMC loses lock
  • PSL Power remains 61 Watts
• 1453 GRD IFO taken from AUTO to MANAGED
• 1500 ISC LOCK eventually taken DOWN and everything looks somewhat normal.

I will probably run an Initial Alignment and return to the game plan of locking H1 and running measurements at NLN.