M-485B Horn Signal Controller Instructions
Rev. 4/12/2022
Customer Support: 1-920-793-4507
To change the M-485B output to the restricted visibility codes for “SAIL” vessels, gently pull the
jumper up off the pins and move it, to disconnect the jumper circuit as shown below.
**NOTE: When moving the jumper to make changes the unit must also be re-powered for this
change to take effect