Every motorboat owner has a tale of hitting a submerged obstacle or boat ramp and damaging a propeller. Typically metal, it must be removed and taken to a prop repair shop, then sandblasted, bent, ...

In a recent column I described how my friend David Ewing, CTO at Synapse Wireless, is in the process of designing and building 250 wireless mesh networked propeller beanie hats. Known collectively as ...