Graham_Wright
Well-Known Member
Following extensive correspondence with Raymarine, the answer to the questions I posed about failure mode operations seem to be as following.
In a system with a DSM (high resolution) fishfinder, its processing logic produces data on bottom topography for historical display on a plotter. It also generates a raw instantaneous depth output for use by a slave instrument (depth ST60(/+) or tridata). This information is transmitted over the SeaTalk highway.
If a (separate) depth transducer is also connected to the ST60+ (only the "+" version), and if the DSM is switched off or has failed, the ST60+ will then act as a master to its own dedicated transducer, switch it on and display instantaneous depth. This switchover is automatic.
In this mster mode, depth alarms are active. They are not active when the ST60+ is acting as a slave to the DSM.
In a system with a DSM (high resolution) fishfinder, its processing logic produces data on bottom topography for historical display on a plotter. It also generates a raw instantaneous depth output for use by a slave instrument (depth ST60(/+) or tridata). This information is transmitted over the SeaTalk highway.
If a (separate) depth transducer is also connected to the ST60+ (only the "+" version), and if the DSM is switched off or has failed, the ST60+ will then act as a master to its own dedicated transducer, switch it on and display instantaneous depth. This switchover is automatic.
In this mster mode, depth alarms are active. They are not active when the ST60+ is acting as a slave to the DSM.