Envelope/volume
Marcos Lopez malopez@gmv.com
GMV
Parameter |
Number of bits |
Description |
---|---|---|
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 |
*Only if rectangle is the geometry used for aft. If rectangle is not the geometry used for aft, these parameters will be omitted.
** Only if rectangle is the geometry used for 3DaboveWL. If rectangle is not the geometry used for 3DaboveWL, these parameters will be omitted.
Table Geometry
Type |
Code |
Rectangle |
0 |
Triangle |
1 |
Ellipse |
2 |
Circlesector |
3 |