|
WATCH TOWER |
|
| SN | A building or structure from which observation is kept of the approach of danger. |
| CL |
DEFENCE |
| BT | MILITARY OBSERVATION SITE |
| RT |
BEACON
CUSTOMS LOOKOUT FRONTIER DEFENCE LIGHTHOUSE MARTELLO TOWER TOWER
|
|
WATCH TOWER |
|
| SN | A building or structure from which observation is kept of the approach of danger. |
| CL |
COMMUNICATIONS |
| RT |
CUSTOMS LOOKOUT
MARTELLO TOWER SIGNAL STATION TOWER
|