No ELT is a good sign, they may have had a hard landing...but are still alive.
https://beatofhawaii.com/hawaii-helicopter-tours/
Company has a good record and flies a solid system - the ASTAR B2 aircraft with 1D1 Turbomeca engines
Not a lot of good landing spots up there on the island. Ocean or steep canyons.
The wreckage and six bodies have been recovered. It appears that weather was a factor in the crash:
The Coast Guard said it was notified of the missing helicopter just after 6 p.m. and launched a MH-65 Dolphin rescue helicopter crew, a cutter and other resources.
Petty Officer 1st Class Robert Cox, of Coast Guard Joint Rescue Command Center Honolulu, previously said weather conditions in the search area were “challenging,” with low visibility and blustery winds, according to CNN affiliate KHNL/KGMB.
“There was a cold front that came through the area around that time, bringing scattered showers and an increase of wind gusts,” CNN meteorologist Robert Shackelford said.
https://www.cnn.com/2019/12/27/us/hawaii-tour-helicopter-missing/index.html