NMEA CUR datagram format
The NMEA CUR datagram contains multi-layer water current data. This includes the depth and speed of the current.
Format
$--CUR,A,x,d,l.l,m.m,x.x,a,k.k,r.r,h.h,a,a,*hh<CR><LF>
Description
This description is not complete. For additional details, refer to the NMEA standard.
1 $—: Talker identifier
2 CUR: Datagram identifier
3 A: Validity
•  A = The data are valid.
•  V = The data are not valid.
4 d: Data set number (1 - 9)
5 l.l: Layer number
6 m.m: Depth (Metres)
7 x.x: Sea current direction in degrees
8 a: Direction reference in use
•  T = True
•  R = Relative
9 k.k: Sea current speed in knots
10 r.r: Reference layer depth in metres
11 h.h: 
12 a: Heading reference in use
•  T = True
•  M = Magnetic
13 a: Speed reference
•  B = Bottom track
•  W = Water track
•  P = Positioning system
14 *hh: Checksum
Related topics
NMEA datagram formats