RIP :-(
My condolences for the families. :-(
As Aser said, a SAR platform for night operations must be inherent stable.
BK177 is not the best for that job...
I have done both Lim-SAR and All Weather SAR and I know how hard is a sailing vessel hoist without autohover at night.
Bk's rigid rotor is a handicap for that kind of operation.
Not every helicopter is suitable for every job...