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Helicopter pickup of passengers.

If I recall correctly, cruise ships crew numbers about one crew per two passengers.

930 Passengers (fully loaded)
465 Crew (guesstimate)
1395 Persons (Total)

How many persons can be picked up in what period of time?
Here is a rate guesstimation.

Chinook = cap 60, crew of 10, evacuating at a load of 40 evacuees:
4 baskets at once,
4 minutes per person packed and lifted,
= 1 person per minute per helicopter evacuated.

With 2 Helicopters hovering at once, and a minimum of two others offloading and refueling, this is 120 persons per hour, or 11-1/2+ hours for evacuation of 1395 persons if nothing goes wrong.

As it is spring, 12 hours of daylight was available.

I am concerned.