The lights on both bridges are like traffic lights on the roads.
All red = Stop
All green = Go
3 reds with an amber on top = proceed with caution.
You will get the red and amber combination when the bridges are down (or stuck in the case of the Twin Sails bridge), and there may be others vessels coming through at the same time. Any problems, call bridge "control" on channel 12.
You are not allowed to tie up along the Quay unless a very large vessel and have proir permission, but instead should use the Poole Quay Boat Haven, which have modern and safe pontoons, normal fenders or if a RIB, may not be needed. It is free for stops of less than 20 mins or about £4 for a couple of hours.
Come and say hello, we are on the Quay next to the Haven