However, I don't buy your point of not pressing any buttons.
You may not be so familiar with Spidertracks and by the looks you don't really know how it works.
On failure of the power source and you have
not cancelled the Watch it will automatically initiate cascade phone calls, emails, SMS text messages............
And it automatically starts on movement to commence tracking.
Have a read of the operating instructions some time.
An ELT is reactive and relies on the ELT surviving the accident. A broken antenna or 50 mm of water above the antenna will stop it.
Spidertracks is pro-active and at least it will tell someone where you where 2 minutes prior at the most.
I would take the Spidertracks over an ELT thanks if given the choice. It sits in front of me and tells me its working.
In my experience of flying and maintaining helicopters for nearly 30 years units like this are possibly the best thing since sliced bread.
As an an LAME I have recovered numerous aircraft where the ELT has not worked.
Currently I operate in different countries where the SAR is virtually non existent.
It automatically calls people who know what to do about it with far more knowledge and resources and you decide and configure who that is.
You can even set it up to call or message your local SAR services and/or whoever you want.
ELT
and GPS Tracking is the best option - someone needs to make one.
PS Spidertracks have just ticked over 5 million flight hours of tracking !!
WRT Spot - not much use to me as the coverage is not global.