OK

Look at the key at left. The vaporetto lines are mostly numbers. The Alilaguna lines (at bottom) are all letters.

The lines for each boat are shown in different colors and are shown along their entire route. BUT the different boat lines stop only where you see their number/letter appear in the white lozenge indicating a stop. If the line just passes over the lozenge, it does not stop.

For example, find Zatterre. You can see the orange (arancia) Alilaguna line called F that stops there by the F in the lozenge. At the next stop to the right, San Basilio, the orange line just passes by, no F in the white lozenge.

Routes 51 and 61 are vaporetto routes. The Alilaguna routes are F and R; neither one goes to Piazzale Roma from Zattere.

Casin dei Nobili has only one location; it's not on the Giudecca canal but off Campo San Barnaba.

We ate well at the Casin dei Nobili, off Campo San Barnaba, but it might have a sister establishment on the Zattere, which may well be more costly. Have a drink (order a spritz) at the Ai Artisti bar in Campo San Barnaba, and say hello to the bar staff there for us. We're going back there in a year.

Thanks