0 0 LAND STATION (SYNOPTIC NETWORK)
1 1 SHALLOW WATER STATION (FIXED TO SEA/LAKE FLOOR)
2 2 SHIP
3 3 RIG/PLATFORM
4 4 MOORED BUOY
5 5 DRIFTING BUOY (OR DRIFTER)
6 6 ICE BUOY
7 7 LAND STATION (LOCAL NETWORK)
8 8 LAND VEHICLE
9 9 AUTONOMOUS MARINE VEHICLE
31 31 MISSING VALUE
