Target lock, event marks, school speed, north-up and the cursor's latitude and longitude all depend on data from other equipment on your boat. When one of them does nothing, the cause is usually a missing input rather than a fault in the sonar.
At a glance
- Heading, speed and course, and position are the three inputs that matter
- Up to 5 NMEA 0183 ports on the processor
- Target lock needs heading plus speed and course
- A motion sensor is standard and drives beam stabilization
About 7 minutes. Part of Run the CSH-10 in the CSH-10 course.
The three inputs
The CSH-10 listens to the rest of the boat on serial NMEA 0183 ports and, through a converter, NMEA 2000. Three kinds of data matter most:
- Heading from a compass, gyro or satellite compass (sentences such as HDT, HDG or HDM).
- Speed and course over the ground or through the water (VTG, RMC, VBW or VHW).
- Position from GPS (GGA, GNS or GLL).
The processor has five NMEA 0183 ports, at 4800 to 38400 baud. Depth and water temperature can come in too, for the data window and its graphs.
What needs what
Furuno's manual ties each feature to its inputs:
- Target lock, event marks and fish marks: heading plus speed and course.
- Target lock in position mode and the cursor's latitude and longitude: position data as well.
- North-up and course-up displays: heading plus speed and course. Head-up is the factory default.
- Water temperature and depth graphs: a temperature and a depth sensor.
- Auto retraction: speed data. See the hoist lesson for why a bad speed feed matters here.
The motion sensor
The CSH-10 ships with a motion sensor, mounted on the raise and lower drive. It measures pitch and roll so the sonar can stabilize the transmit and receive beams independently. The stabilization lesson shows what that does to the picture. If the sensor, its cable or its offsets are wrong, the beam is steered wrongly, which is a setup problem for your installer.
When a feature does nothing
Work backward. Does the feature need heading, speed and course, or position? Is that data arriving on a port with the right baud rate and format? Is the source (GPS, compass) powered and sending? Furuno's setup checklist also has the installer align the heading by pointing the sonar at an object dead ahead, such as a buoy, and entering the correction. A heading that is a few degrees off will place every mark a few degrees off too.
Your installer can check the port settings. If you add a new chartplotter or compass, ask the installer to re-check the sonar's inputs afterward.
Check yourself
Three questions
Sources
- CSH10 Operator's Manual: Appendix 7, data requirements
- CSH10 Installation Manual: Chapter 2, interfacing and chapter 3, setup
- CSH10 Interconnection Instructions: Interconnection
This lesson summarizes Furuno's public documents in our own words. Limits and settings differ by model and software version, so your own manual and your installer have the last word. OmniCSH is an independent project, not a Furuno program.