Samyung ENC SI-30A, Manual Instruction

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① sequence number ② control flag
③ MMSI of requestor ④ MMSI of destination
⑤ latitude, N/S (NE co-ordinate) ⑥ longitude, E/W (NE co-ordinate)
⑦ latitude, N/S (SW coordinate) ⑧ longitude, E/W (SW coordinate)
6-3-20 OSD – Own ship data
Heading, course, speed, set and drift summary. Useful for, but not limited to radar/ARPA
applications. OSD gives the movement vector of the ship based on the sensors and
parameters in use.
$--OSD, x.x ,A ,x.x ,a ,x.x ,a ,x.x ,x.x ,a *hh<CR><LF>
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨
①
Heading, degrees true
②
Heading status: A = data valid, V = data invalid
③
Vessel course, degrees true
④
Course reference, B/M/W/R/P (see Note)
⑤
Vessel speed
⑥
Speed reference,B/M/W/R/P (see Note)
⑦
Vessel set, degrees true
⑧
Vessel drift (speed)
⑨
Speed units, K = km/h; N = knots; S = statute miles/h
NOTE Reference systems on which the calculation of vessel course and speed is based. The
values of course and speed are derived directly from the referenced system and do not
additionally include the effects of data in the set and drift fields.
B = bottom tracking log
M = manually entered
W = water referenced
R = radar tracking (of fixed target)
P = positioning system ground reference.
6-3-21 RMC – recommended minimum specific GNSS data
This sentence is used to transmit the time, data, position, course and speed data from a
GNSS navigation receiver. The sentence is transmitted at least once every two seconds from
GNSS device(s) and is always accompanied by an RMB sentence when a destination waypoint
is active.
$--RMC ,hhmmss.ss ,A ,llll.ll,a ,yyyyy.yy,a ,x.x ,x.x ,xxxxxx ,x.x,a ,a *hh<CR><LF>
① ② ③ ④ ⑤ ⑥ ⑦ ⑧ ⑨
① UTC of position fix
② status (‘A’ -> use mode field; ‘V’ -> use fields as default values)
③ latitude, N/S
④ londitude, E/W
⑤ speed over ground ⑥ course over ground