Yachting Home › Forums › All things Technical › Above Decks › Raymarine st60 masthead wind speed & direction instrument › Reply To: Raymarine st60 masthead wind speed & direction instrument
Here’s a query regarding the speed they rotate at and their calibration.
At the end of last season I found my indicator was over-reading rather considerably by anything up to 30% (on a club rally after a long beat in a strongish wind I told my fellow skippers I had seen over 40 knots at one stage. I was then laughed at with others saying they hadn’t even seen 30 knots).
On the display head you can set a factor in theory to calibrate the unit. However without a reference that is very difficult. Raymarine on their support pages don’t seem to have any advice, other ‘adjust accordingly’.
Sitting in my boat looking at half a dozen other ST60 indicators going round I was amazed to see the huge difference in speeds. Presumably that is likely to be down to the bearings?
My indicator is only a year old and seems to rotate very well and the factor is set at zero.
One has to assume that an indicator in perfect, as new, condition just needs the zero setting.
So what could make my unit over read so much?