Looks like your 200 hour accident was an express delivery at 20! Still, you all escaped remarkably well and the life jacket you did wear saved your bacon - so take credit for that (I'd guess you had your mates wear their's too). Everyone forgets a killcord sometimes (especially after a very good lunch
). You won't forget again....
As others said - major kudos for 'fessing up to this!
For what it's worth re training rookie crew - I have extreme difficulty impressing on fresh fish that my safety brief is for their benefit - and a few happy days have been soured by my grumpy response to their stupid fcuking comments about why would they need the spare killcord/keys/first aid/DSC button etc.
Apart from the analgesics, take a chill pill and hit the water ASAP (in the rib