It's unusual for a directional siren to have its rotation disabled, but the Thunderbolt's rotator can be disabled manually by a switch in the motor starter cabinet. The operator would set the rotator to "Manual" until the horn reaches the desired position, then the switch would be moved to "Off." For normal operation with the rotator activated, it would be set to "Auto."robert gift wrote:Do the projectors always rotate, or can they aim them at an area, for example, towards town?
As for the Hurricane, I'm unsure as to whether the rotator could be disabled by a switch as well.