Air Traffic Control Fully Certified
Other / Unknown
ATC Issue All Types
Air Traffic Control Issued New Clearance
ATC Equipment / Nav Facility / Buildings; Environment - Non Weather Related
I was the CPC training on Local Control. The Developmental being trained cleared aircraft 1 for take off while Aircraft 2 was on short final. Aircraft 1 advised Tower that there was an aircraft on short final and the Developmental immediately cancelled Aircraft 1's take off clearance and told them to hold short of the runway. After discussing the incident the main reason the Developmental cleared aircraft 1 for take off was the fact that he didn't see Aircraft 2 on short final because the windsock obstructs our view of the flight path of all aircraft landing Runway 23. Since the actual Tower is being rehabilitated and the windsock is a very big obstruction to our vantage point in the mobile Tower; I suggest the windsock be relocated or taken down until we return to the actual Tower.
MMU Controller described a take off clearance not accepted by the departing aircraft because of traffic on short final; the Controller noting the Tower visibility from the temporary tower is obstructed by the wind sock location.