Answers from Raymarine
unfortunately the total distance is not a parameter that can be canceled even if a factory reset is performed on the ST60/+ display.
after checking with the UK service
, I confirm the above.
Total miles were accumulated in permanent memory and cannot be reset.
In the past, the solution could have been to replace the electronic board but, in addition to the perhaps unjustifiable cost, since it is not a fault, the parts
are currently no longer available.