An evening on a landing craft

Tonight, I've got {also: I'm going to} a party on a landing craft. I've got friends who live there, on the river "La Seine" {better: on the Seine river} just before {more common: near} Paris.
Originally, a landing craft is used to convey raw materials like sand, gravel for construction, and also containers. It's possible to transform it in into a flat, a big flat, because the living aera area is between 150 and 200 square meters. I like to go visiting visit my friends there, because in summer, we eat outside. We watch the sunset, the movement of the water, and the birds. It's very relaxing.