- Complies with IMO Resolution and IEC specifications
- Provides accurate speed measurement in shallow    water (1 cm/s, bottom clearance>1 m)
- Bottom-tracking speed down to 200 m depth. Auto or    manual changeover between ground- and    water- tracking
- Large backlit color LCD display gives versatile    presentation in graphic and alphanumeric form
- 3-beam transmission reduces effects of pitch and roll    for better accuracy
- Two hull unit types to choose from: gate valve or    diver replaceable using watertight connector
- Displays ship's speed and course with ground tracking    accuracy when interfaced with an external GPS    receiver