I hope you're a little thick skinned, Jon, so you can take it when I swipe at Apple. Some of the new UI "enhancements" in iOS 7 were "adopted" from the now-orphaned WebOS (Palm's last-gasp OS that was developed further by HP who sunk hundreds of millions into it) with perhaps a few nuances coming from Windows 8. For example Apple now swipes tiles upward to close programs (just like WebOS did), while Windows 8 swipes them down. I can't think of anything in iOS 7 we haven't seen before... IMHO Apple is lacking inspiration in the innovation arena, and producing too much "Me too". BTW iOS7 was a significant setback in user-intuitiveness from iOS6. Now people need to read a manual or HELP screen to find some functions that were obvious in the last version, but they made that hard to find also.
Apple still has that marketing and design magic though, got to give them credit for "pretty" and for developing/executing marketing an ecosystem of products and services that has developed an incredibly loyal fan base. Who would have thought 10 years ago that iTunes would be considered acceptable software to be installed in the computers of corporate executive suites? Blackberry loyalists used to be able to say "the iPhone isn't suitable for business... would you want iTunes as a component in your corporate software?" They can still say that, but people aren't listening. I think it's Google who's going to eat their lunch, as they've already got 80% of the mobile device market and they're building an ecosystem whereby the cloud is the computer, and the devices are just portals.
The scariest part is that Google has now monetized us! Yes, YOU and ME! We've been "owned". It's been officially stated in a California court's judicial opinion that Google's product is it's users. Link below. BTW that also goes for FaceBook, LinkedIn etc.
Getting back to your statement "If your Epirb is underwater, no transmission". Yes there's no arguing that. In my case a capsize would have the EPIRB floating inside the capsized hull, and it it's designed to trigger automatically if it's dropped in the water. So transmission would be somewhat reduced by the fiberglass hull but probably not totally blocked.