aismsg_22 Struct Reference

#include <vdm_parse.h>

---

Detailed Description

AIS Message 22 - Channel Management.

If the message is for a geographic area its 2 corners are defined by the NE and SW positions. If it is an assigned message the destination MMSI will be in addressed_1 and addressed_2.

Data Fields
char	msgid
	6 bits : MessageID (22)
char	repeat
	2 bits : Repeated
unsigned long	userid
	30 bits : UserID / MMSI
char	spare1
	2 bits : Spare
int	channel_a
	12 bits : M.1084 Channel A Frequency
int	channel_b
	12 bits : M.1084 Channel B Frequency
char	txrx_mode
	4 bits : TX/RX Mode
char	power
	1 bit : Power Level
long	NE_longitude
	18 bits : Longitude in 1/1000 minutes
long	NE_latitude
	17 bits : Latitude in 1/1000 minutes
unsigned long	addressed_1
	30 bits : Destination MMSI 1
long	SW_longitude
	18 bits : Longitude in 1/1000 minutes
long	SW_latitude
	17 bits : Latitude in 1/1000 minutes
unsigned long	addressed_2
	30 bits : Destination MMSI 2
char	addressed
	1 bit : Addressed flag
char	bw_a
	1 bit : Channel A Bandwidth
char	bw_b
	1 bit : Channel B Bandwidth
char	tz_size
	3 bits : Transitional Zone size
unsigned long	spare2
	23 bits : Spare

---

Field Documentation

char aismsg_22::msgid

6 bits : MessageID (22)

char aismsg_22::repeat

2 bits : Repeated

unsigned long aismsg_22::userid

30 bits : UserID / MMSI

char aismsg_22::spare1

2 bits : Spare

int aismsg_22::channel_a

12 bits : M.1084 Channel A Frequency

int aismsg_22::channel_b

12 bits : M.1084 Channel B Frequency

char aismsg_22::txrx_mode

4 bits : TX/RX Mode

char aismsg_22::power

1 bit : Power Level

long aismsg_22::NE_longitude

18 bits : Longitude in 1/1000 minutes

long aismsg_22::NE_latitude

17 bits : Latitude in 1/1000 minutes

unsigned long aismsg_22::addressed_1

30 bits : Destination MMSI 1

long aismsg_22::SW_longitude

18 bits : Longitude in 1/1000 minutes

long aismsg_22::SW_latitude

17 bits : Latitude in 1/1000 minutes

unsigned long aismsg_22::addressed_2

30 bits : Destination MMSI 2

char aismsg_22::addressed

1 bit : Addressed flag

char aismsg_22::bw_a

1 bit : Channel A Bandwidth

char aismsg_22::bw_b

1 bit : Channel B Bandwidth

char aismsg_22::tz_size

3 bits : Transitional Zone size

unsigned long aismsg_22::spare2

23 bits : Spare

---

The documentation for this struct was generated from the following file:

• /Users/brianlane/projs/aisparser/c/src/vdm_parse.h

---