Used IMO type-approved marine echo sounders from Furuno, JRC and Skipper — transducer-tested, calibrated and shipped with bench-test report.
Furuno FE-700, JRC JFE-380 and Skipper GDS101 / EA400 series.
Yes — transducers are tested and shipped with the head unit unless otherwise agreed.
Yes — units retain IMO/IEC 61868 type-approval for SOLAS vessels.