Whilst discussing this accident in Turkey lets not forget our international audience by focusing our comments through just a UK prism.
The Untied States has just shy of 500 EMS bases using helicopters and about 77 that use airplanes.
The terrain and weather varies greatly throughout the country as does the population densities.
All of which are factors in where the bases are located and the types of services offered that can be determined by the size of the aircraft utilized.
Consider many of the helicopters are single engine versions also plays a role in safety calculations.
Twins sometimes are just as much a liability as are singles.....thinking of high elevation locations and the earlier model twins that suffered from severe weight limitations when single engine capability was calculated.
Here is a web site that offers some pretty easy to use information. One being a map of all of the bases and what I found interesting is the big dark black area where there are no EMS Helicopter Bases at all.
I look to the map and understanding how many different Operators there are and how training was done in the past....it raises questions how those costs can be controlled yet still accomplish more than a box checking job to it.
When it comes to an IFR program especially....as VFR is no where as complicated. It is trying to teach" aeronautical decision making" at the VFR programs that is the difficult task to convince the Line Pilots that they can say "No" without being at risk for having done so for articulable reasons. At IFR programs the decision is more about determining if the intentional flying in adverse weather is safe. VFR crews are at greater risk should they encounter inadvertent instrument meteorological weather conditions (IIMC) while flying in marginal weather especially at night over dark terrain.
Looking at a Flight Tracker web site I see three EMS helicopters in the air within a 150 nm radius of where I live....and that is only a half circle area.
https://www.ethosdatabase.org/apps/0...1da242/explore