It's the Texas Instruments eZ430 Chronos wireless watch development tool. This is a development tool that includes a sports watch with a wireless connection to a PC.
Three simple marine applications that come to mind:
- Show navigation data such as Speed Over Ground, Wind Speed etc. etc. on your wrist.
- Control your auto-pilot (via NMEA 2000).
- Act as a Man Over Board detection device.
The possibilities are endless as they say.