#4 bus stop
For the #4 bus, you need to walk down Via Torpediniera Spica from the marina gates to the main road (Via Materdomini) and then walk about 50m SW past the old run down market (that did not open in 2009).
If you are going to catch the #4 bus back to the marina again, you had better find a landmark to warn you when approaching the bus stop, as you will need to signal to the driver before you reach the stop.
The #5 bus, however, takes you right to the marina gate.
Howard [ Just Imagine ] 02-Oct-2009