These were built along the coast behind the main fortified line which was right on the coast. As their height made these highly visible they were disguised as residential buildings with tiled roofs or other buildings such as equipment warehouses and barracks were built near them. Great telescopes and precision telemetrics were set up in the slit windows at the top of these towers from which targets were observed and monitored and co-ordinates supplied to the batteries which used these as shelling targets. Each battery received co-ordinates from three separate telemetry towers at suitable distances apart and the distances between the targets to be hit were calculated by trigonometry. The civilian population of Cavallino nicknamed these towers 'traffic lights' because of the large coloured discs sometimes placed on the top of them as signals. There were several of these along the coast and some of them are still being lived in while others have been converted for craft activities. Starting from Punta Sabbioni and moving in the Cavallino direction and then returning first along Via Pordelio and then along Via Fausta we come across:
1) The partially inhabited Lio Grando tower;
2) The two Forte Vecchio towers, one of which is still partially inhabited;
3) The tower of the former Ca'Pasquali barracks;
4) Crepaldo tower;
5) The partially inhabited Ca'Padovan tower;
6) Radaelli tower in Ca’Ballarin;
7) The partially inhabited Ca'Bodi tower;
8) Sassonio tower used for craft glass workshops;
9) Vignotto tower;
10) Tower in Ca’ di Valle now used as a residential complex;
11) The San Marco 'Caffettiera' tower;
12) Ca’Scarpa tower;
13) Tower in Ca’Savio;
14) Tower in Via Hermada at Punta Sabbioni.
Text from the book: "Le Fortificazioni - Frammenti di guerra".