Helicopter Operators on the North Slope of Alaska did night IMC Underslung work for decades using 212/412's. The aircraft had both Sperry and Bell SCAS systems.
Yup, we did the same in the Beaufort Sea (just a bit to the east) for years as well using 212/61/76's. IFR slinging was not approved in Canada at the time so we just turned the landing lights out at 200 feet on the way up.
And any stories of people shooting S61 ILS approaches into Inuvik with slingloads are, ummmm, ... probably not true
