Sea Tow Annapolis - Station #1647
Latitude / Longitude:
38.98° / -76.45°
Elevation:
2 m
Operated By:
Sea Tow MD Central Chesapeake
Equipment Description:
Milltec, Yagi, 20m altitude
Current Status & Statistics
| Status | ONLINE |
| Availability | 100% (2132 hours online / 2133 total hours) |
| Reception distance in nautical miles | Average: 2.8 / Max: 14.6 |
| Records received in 1 hour | Distinct Vessels: 82 / Positions: 2421 |
| Area Covered | 615 km2 |
Period Statistics
| Period | Availability | Reception Distance | Area Covered |
|---|---|---|---|
| 1 Month | 100% | 11 NM | 878.5 km2 |
| 2 Months | 100% | 10 NM | 706.9 km2 |
| 3 Months | 100% | 9 NM | 585.8 km2 |
| 6 Months | 100% | 7 NM | 426.5 km2 |
| 9 Months | 99.6% | 21 NM | 520.3 km2 |
Ais Message Type Statistics
| Message Type | Count |
|---|---|
| Total Ais Messages | 71.8 |
| MSG 1,2,3 - Position report - Class A | 27.5 |
| MSG 5 – Ship’s Static and Voyage related data | 1.1 |
| MSG 4 – Base Station report | 5.1 |
| MSG 6,8 – Binary messages | 0.3 |
| MSG 9 – SAR Aircraft position report | 0 |
| MSG 12, 14 – Safety related message | 0 |
| MSG 18 – Class B position report | 12.9 |
| MSG 19 – Extended Class B report | 0.1 |
| MSG 24 – Class B Ship’s Static data | 3.6 |
| MSG 21 – Aids-to-Navigation report | 20.8 |
| MSG 27 – Position report for Long-range applications | 0 |
| Other AIS Messages (AIVD) | 0.7 |
| Other Non-AIS messages | 0 |
| Errors | 0 |
| Inconsistent positions | 0 |