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Appendix A | V5035 Operator and Installation Manual

LRI – AIS Long-Range Interrogation

The long-range interrogation of the AIS unit is accomplished

through the use of two sentences. The pair of interrogation sen-

tence formatters, a LRI sentence followed by a LRF sentence, pro-

vides the information needed by a universal AIS unit to determine

if it should construct and provide the reply sentences (LRF, LR1, LR2,

and LR3).

$--LRI,x,a,xxxxxxxxx,xxxxxxxxx,llll.ll,a,yyyyy.yy,a,llll.ll,a,yyyyy.yy,a*hh<CR><LF>

Field No. Format Description Remark

1 x Sequence number

2 a Control ﬂag

3 xxxxxxxxx MMSI of requestor

4 xxxxxxxxx MMSI of destination

5 llll.ll,a Latitude – N/S

6 yyyyy.yy,a Longitude – E/W

7 llll.ll,a Latitude – N/S

8 yyyyy.yy,a Longitude – E/W

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>

Field No. Format Description Remark

1 x.x Heading, degrees true

2 A Heading status: A = data valid, V = data invalid

3 x.x Vessel course, degrees true Ignored

4 a Course reference, B/M/W/R/P (see Note) Ignored

5 x.x Vessel speed Ignored

6 a Speed reference,B/M/W/R/P (see Note) Ignored

7 x.x Vessel set, degrees true Ignored

8 x.x Vessel drift (speed) Ignored

9 a

Speed units, K = km/h; N = knots;

S = statute miles/h

ignored

Simrad V5035 User Manual

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