Originally Posted by Brewgyver
Paolo, not sure you realize, but that graphic is cropped to the point of being meaningless. There are two different colors used in the bard "SAR Events..." but the descriptor for both has been trimmed after the word "Events" (on the right side of the graph). There would have to be a reason for two different colors, but we cannot see what it is due to the cropping.
Also, as has been pointed out by Take5, this graph is from the Satelite service, so of course the numbers would grow as the numbers of transmitters grow. Also, we have no way of knowing how they define and "Event" (e.g. are accidental activations excluded, etc). Lastly, a large portion of the "Events" shown on the map on their web page (which you linked to), were mainland locations, very few offshore.
Minus a LOT more information, the graph is pretty meaningless.
It's Paulo. Yes, I have already explained that. You have you to add the two bars even if the two epirbs were not used for the same thing. The blue one, was the 121.5, it had a smaller range and was used mostly locally (coastal). The red one was the one that was used offshore and had a global coverage (406).
The black graphic on top is independent of both types and therefore is meaningful.