TIMEBALL TOWER

SN A structure for visually communicating the exact time to ships in anchorage. A ball slides down a mast at the top of the tower, usually at noon or one o'clock exactly.
CL COMMUNICATIONS
BT SIGNAL TOWER
RT BEACON
LIGHTHOUSE

 
 

TIMEBALL TOWER

SN A structure for visually communicating the exact time to ships in anchorage. A ball slides down a mast at the top of the tower, usually at noon or one o'clock exactly.
CL MARITIME
BT NAVIGATION AID