OK. Here are the measurements.
Main hull 29.3cm or 11.53in
LOA 39.73cm or 15.6in
144 scale gives the hull at 42.2m or 138.4ft. And LOA would be 57.2m or 187.7ft.
This is far short of the 70m length given in the book.
The model needs to be 48.6cm or 19.1in long.
- Leelan