When Titanic was launched it was like an empty shell.

It had no funnels or propellers or fitted decks.

There was a special dock for the Olympic near by.

It was called the Thompson dock and that is where titanic was fitted out.

The Arrol gantry wanted to construct bigger and bigger ships like olympic and titanic new equipment was needed such as a gantry, a bridge-like structure with cranes, travelling frames  lifts and walkways.