SJU TWR CTLR CONCERNED WITH ARPT SCANNING CAPABILITY DUE TO VAPOR CONDENSATION ON EXTERNAL SURFACE OF TWR WINDOWS.

Narrative

TWR WINDOWS FOG UP AT APPROX XA:00 PM AND THEN BEGIN TO DEFOG AT ABOUT XI:00 AM THE NEXT MORNING. THERE WILL BE PROBS IF THIS SIT IS NOT TAKEN CARE OF. 10 OF THE 16 WINDOWS IN THE TWR FOGGED TONIGHT ON MY MID SHIFT. I CAN NOT SEE THE RWYS/TXWYS OR THE SKY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED THAT WHEN MAINT IS CALLED; THEY USE A WINDOW SQUEEGEE TO REMOVE THE EXTERIOR WINDOW CONDENSATION. EXTERIOR WINDOW CONDENSATION VARIES WITH ATMOSPHERIC HUMIDITY AND INTERIOR AIR CONDITIONING CLIMATE CTL. MGMNT REQUESTS THAT THE INTERNAL TWR CAB TEMP CTL REMAIN IN THE MID 70 DEG RANGE. THE RPTR ADVISES THAT THE TEMP IS ADJUSTED TO COUNTERMAND EXTERIOR HEAT AND HUMIDITY. IT HAS BEEN RECOMMENDED THAT A WATER SPRAYING SYSTEM BE INSTALLED ABOVE EACH WINDOW THAT WOULD BE MANUALLY ACTIVATED TO CLR CONDENSATION. ALTHOUGH THIS IS A CONTINUAL AND CONSTANT PROB FOR THE CTLR'S; NO RESOLUTION HAS BEEN FORTH COMING. THE RPTR IS CONCERNED THAT ACFT AND VEHICLE MOVEMENT CAN NOT ALWAYS BE MONITORED TO ENSURE A SAFE ATC OP.