37.1.5 $PNORS1 – Sensor Data .......................................................................................................... 427.1.6 $PNORCV – Velocity data per Cell ........................................................................................... 427.1.7 $PNORC1 – Velocity data per Cell ............................................................................................ 427.1.8 $PNORBT4 – Speed over ground and depth ............................................................................ 437.1.9 $VDVDR – Current Speed and Direction .................................................................................. 438 Installation .............................................................................................................................................. 448.1 Instrument orientation .................................................................................................................... 448.2 Mounting Considerations ............................................................................................................... 448.2.1 Bubbles ...................................................................................................................................... 448.2.2 Grounding .................................................................................................................................. 448.2.3 Ship movements ........................................................................................................................ 458.2.4 Ship generated flow fields ......................................................................................................... 458.2.5 Over the Side Mounting ............................................................................................................. 469 Maintenance ........................................................................................................................................... 509.1 Signature Sensor ........................................................................................................................... 509.2 Biofouling ....................................................................................................................................... 509.2.1 Antifouling Paint and patches .................................................................................................... 509.3 Instrument Care ............................................................................................................................. 509.4 Connector Care ............................................................................................................................. 519.5 Cable Care..................................................................................................................................... 5110 Troubleshooting ...................................................................................................................................... 5210.1 Remote Support through TeamViewer .......................................................................................... 5210.2 Communication .............................................................................................................................. 5310.2.1 Cable ......................................................................................................................................... 5310.3 Power ............................................................................................................................................. 5310.3.1 Interface does not switch on ...................................................................................................... 5310.3.2 Power to the Signature sensor .................................................................................................. 5311 Computer configuration .......................................................................................................................... 5412 GNSS ..................................................................................................................................................... 5612.1 Filter setting ................................................................................................................................... 5612.2 Increasing the accuracy using RTK (NTRIP) ................................................................................ 5613 Glossary ................................................................................................................................................. 5814 Connector Pin Configurations ................................................................................................................ 60