$--VHW

Summary
NMEA 0183 standard Water Speed and Heading.

Syntax
$--VHW,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>*hh<CR><LF>

Fields
<1>    Compass Heading, degrees True
<2>    T = true
<3>    Compass Heading, degrees Magnetic
<4>    M = magnetic
<5>    Water speed, knots
<6>    N = knots
<7>    Water speed, km/h
<8>    K = km/h