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package nmea
const (
// TypeRMB type of RMB sentence for recommended minimum navigation information
TypeRMB = "RMB"
// DataStatusWarningClearRMB means data is OK
DataStatusWarningClearRMB = "A"
// DataStatusWarningSetRMB means warning flag set
DataStatusWarningSetRMB = "V"
)
// RMB - Recommended Minimum Navigation Information. To be sent by a navigation receiver when a destination waypoint
// is active. Alternative to BOD and BWW sentences.
// https://gpsd.gitlab.io/gpsd/NMEA.html#_rmb_recommended_minimum_navigation_information
// http://aprs.gids.nl/nmea/#rmb
//
// Format: $--RMB,A,x.x,a,c--c,c--c,llll.ll,a,yyyyy.yy,a,x.x,x.x,x.x,A*hh<CR><LF>
// Format (NMEA2.3+): $--RMB,A,x.x,a,c--c,c--c,llll.ll,a,yyyyy.yy,a,x.x,x.x,x.x,A,m*hh<CR><LF>
// Example: $GPRMB,A,0.66,L,003,004,4917.24,N,12309.57,W,001.3,052.5,000.5,V*0B
type RMB struct {
BaseSentence
// DataStatus is status of data,
// * A = OK
// * V = Navigation receiver warning
DataStatus string
// Cross Track error (nautical miles, 9.9 max)
CrossTrackErrorNauticalMiles float64
// DirectionToSteer is Direction to steer,
// * L = left
// * R = right
DirectionToSteer string
// OriginWaypointID is origin (FROM) waypoint ID
OriginWaypointID string
// DestinationWaypointID is destination (TO) waypoint ID
DestinationWaypointID string
// DestinationLatitude is destination waypoint latitude
DestinationLatitude float64
// DestinationLongitude is destination waypoint longitude
DestinationLongitude float64
// RangeToDestinationNauticalMiles is range to destination, nautical miles (999,9 max)
RangeToDestinationNauticalMiles float64
// TrueBearingToDestination is true bearing to destination, degrees
TrueBearingToDestination float64
// VelocityToDestinationKnots is velocity towards destination, knots
VelocityToDestinationKnots float64
// ArrivalStatus is Arrival Status
// * A = arrival circle entered
// * V = not arrived
ArrivalStatus string
// FAA mode indicator (filled in NMEA 2.3 and later)
FFAMode string
}
// newRMB constructor
func newRMB(s BaseSentence) (Sentence, error) {
p := NewParser(s)
p.AssertType(TypeRMB)
rmb := RMB{
BaseSentence: s,
DataStatus: p.EnumString(0, "data status", DataStatusWarningClearRMB, DataStatusWarningSetRMB),
CrossTrackErrorNauticalMiles: p.Float64(1, "cross track error"),
DirectionToSteer: p.EnumString(2, "direction to steer", Left, Right),
OriginWaypointID: p.String(3, "origin waypoint ID"),
DestinationWaypointID: p.String(4, "destination waypoint ID"),
DestinationLatitude: p.LatLong(5, 6, "latitude"),
DestinationLongitude: p.LatLong(7, 8, "latitude"),
RangeToDestinationNauticalMiles: p.Float64(9, "range to destination"),
TrueBearingToDestination: p.Float64(10, "true bearing to destination"),
VelocityToDestinationKnots: p.Float64(11, "velocity to destination"),
ArrivalStatus: p.EnumString(12, "arrival status", WPStatusArrivalCircleEnteredA, WPStatusArrivalCircleEnteredV),
FFAMode: "",
}
if len(p.Fields) > 13 {
rmb.FFAMode = p.String(13, "FAA mode") // not enum because some devices have proprietary "non-nmea" values
}
return rmb, p.Err()
}
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