Message ID

6

Identifier for Message 8

Repeat Indicator

2

Used by the repeater to indicate how many times a message has been repeated. 0=default; 3= do not repeat any more

Source ID

30

MMSI number of source station

Spare

2

Not used. Should be zero

DAC

10

International DAC. (DAC=100=1100100b) should be 224 or 225

FI

6

Function identifier. (FI=100=1100100b) heading says 50

Hour Generation

5

Minute Generation

6

Second Generation

6

Geometry Aft

2

Geometry form of the aft section. See Table Geometry.

Geometry Bow

2

Geometry form of the bow section. See Table Geometry

Geometry Curve

2

Geometry during direction change. See Table Geometry.

Geometry 3D Above WL

2

Geometry form 3D above water level.

Geometry 3D Under WL

2

Geometry form 3D under water level.

Longitude Point 1

28

Longitude in 1/10000min. If rectangle is the geometry used for Aft: Point 1= Point Aft[3]. If the envelope using ELLIPSE as whole envelope Point 1=Point Aft[269].

Latitude Point 1

27

Latitude in 1/10000min

Longitude Point 2*

28

Longitude in 1/10000min. Point 2= Point Aft[2]

Latitude Point 2*

27

Latitude in 1/10000min

Longitude Point 3

28

Longitude in 1/10000min. If rectangle is the geometry used for Aft: Point 3= Point Aft[0] = Point Curve[0]. If the envelope using ELLIPSE as whole envelope Point 3=Point Aft [0]

Latitude Point 3

27

Latitude in 1/10000min

Longitude Point 4*

28

Longitude in 1/10000min. Point 4= Point Aft[4]

Latitude Point 4*

27

Latitude in 1/10000min

Longitude Point 5

28

Longitude in 1/10000min. If rectangle is the geometry used for Aft:  Point 5= Point Aft[1] = Point Curve[1].  If the envelope using ELLIPSE as whole envelope Point 5=Point Aft [179]

Latitude Point 5

27

Latitude in 1/10000min

Longitude Point 6

28

Longitude in 1/10000min. Point 6= Point Curve[2] = Point Bow[2]

Latitude Point 6

27

Latitude in 1/10000min

Longitude Point 7

28

Longitude in 1/10000min. Point 7= Point Curve[4]

Latitude Point 7

27

Latitude in 1/10000min

Longitude Point 8

28

Longitude in 1/10000min. Point 8= Point Curve[3] = Point Bow [1]

Latitude Point 8

27

Latitude in 1/10000min

Longitude Point 9

28

Longitude in 1/10000min. If triangle is the geometry used for bow: Point 9=Point Bow [0]. If Ellipse is the geometry used for bow: Point 9=Point Bow [89].

Latitude Point 9

27

Latitude in 1/10000min

Longitude Point 10

28

Longitude in 1/10000min. If rectangle is the geometry used for 3DaboveWL and 3DunderWL: Point 10=Point 3DaboveWL[0] = Point 3DunderWL[0].  If Ellipse is the geometry used for 3DaboveWL and 3DunderWL: Point 10=Point 3DaboveWL[0] = Point 3DunderWL[179]. 

Latitude Point 10

27

Latitude in 1/10000min

Altitude Point 10

17

Altitude (+/-)40m * 1000. Resolution: 0.001.

Longitude Point 11

28

Longitude in 1/10000min. If rectangle is the geometry used for 3DaboveWL: Point 11= Point 3DaboveWL[1]. If Ellipse is the geometry used for 3DaboveWL: Point 11= Point 3DaboveWL[89]. 

Latitude Point 11

27

Latitude in 1/10000min

Altitude Point 11

17

Altitude (+/-)40m * 1000. Resolution: 0.001.

Longitude Point 12**

28

Longitude in 1/10000min. Point 12= Point 3DaboveWL[2].

Latitude Point 12**

27

Latitude in 1/10000min

Altitude Point 12**

17

Altitude (+/-)40m * 1000. Resolution: 0.001.

Longitude Point 13

28

Longitude in 1/10000min. If rectangle is the geometry used for 3DaboveWL and 3DunderWL: Point 13=Point 3DaboveWL[3] = Point 3DunderWL[1].  If Ellipse is the geometry used for 3DaboveWL and 3DunderWL: Point 13=Point 3DaboveWL[179] = Point 3DunderWL[0]. 

Latitude Point 13

27

Latitude in 1/10000min

Altitude Point 13

17

Altitude (+/-)40m * 1000. Resolution: 0.001.

Longitude Point 14

28

Longitude in 1/10000min. If triangle is the geometry used for 3DunderWL: Point 14=Point 3DunderWL[2].  If Ellipse is the geometry used for 3D under WL: Point 13=Point 3DunderWL[89].

Latitude Point 14

27

Latitude in 1/10000min

Altitude Point 14

17

Altitude (+/-)40m * 1000. Resolution: 0.001.

Total Bits

949

Occupies 5 slots

Type

Code

Rectangle

0

Triangle

1

Ellipse

2

Circlesector

3