(DG) ST 60 Wind instrument incorrect on port quarter

[Derek - Raymarine - Moderator]

Hi sailingriki

Thanks for the feedback, the standard masthead transducer is the R28170, this is the current version of the masthead transducer, it should plug straight into the existing masthead block.

Please note the early masthead transducers used 'squarish' style cups for the anemometer,whereas current versions, ( since mid 1990's) use hemispherical cups. The hemispherical cups are more efficient and rotate about 30% faster. So if you had the earlier style transducer, the windspeed will over read by about 30%, this can be corrected in the wind speed calibration of the instrument display on all but the early black ST50 style displays.

There is no effect on the wind direction.

One final point, the very early masthead transducers with the 'squarish' style cups, did not have a keyway where they plugged into the masthead mounting block, (which could enable the pins to be misaligned when the transducer was fitted and so bend the pins). All later masthead transducers with the hemispherical cups had a keyway to help alignment and so you may need to remove the keyway if you have one of the very early mounting blocks at the top of the mast.


regards