Raymarine stand-alone master instrument - Manual (Page 23)

20 ST30 Bidata Operation and Installation Handbook
Chapter 4: Maintenance
4.1 Instrument
Atmospheric conditions may cause condensation to appear on the
instrument window. This will not harm the instrument and can be cleared
by increasing the illumination setting to level 3.
Chemical and abrasive materials must not be used to clean the ST30
Bidata instrument; if the instrument is dirty, clean with a soft, damp cloth.
4.2 Transducers
Refer to the Installation and Maintenance instructions supplied with the
transducers.
4.3 Cabling
Examine cables for chafing or damage to the outer shield and, where
necessary, replace and re-secure.
4.4 Advice
For advice, or further information regarding installation of this product,
please contact the Autohelm Product Support Department or your own
National Distributor.