CSH-23F: 15"Color CRT/24,28 AND 32kHz Full Circle
   CSH-24F: 21"Color CRT/24,28 AND 32kHz Full Circle
- Instant fish detection using a 360°, omni-direction,    high power transmission
- Simplified observation and distribution analysis of    targeted fish schools
- Your choice of operating frequencies from 24, 28, or    32 kHz
- Many unique features: Target Lock, Off-center, Net    Shooting Mark, Event Mark, Estimate Marks,    Histogram, True Motion, and Auto Tilt
- Rapidly resetting user-programmable function keys    for the sonar parameters as fishing conditions