The new Spot Gen 3 may be perfect for pilots but if you plan on using it outside near water or in wet environments not so good.

Why?

Because of the flimsy rubber cover over the external USB connector port on the back of the unit. If it comes off during use or even has a slight gap water can leak inside. That's a big risk. Imagine being out in the rain trying to hit the SOS button only to find out the unit is water logged and inoperable.

The Spot User Guide clearly states the unit is NOT waterproof when using line power through the USB port.

You decide....