As the M. N. 1 had to be refitted some miles from Tom's home, where it was feasible to launch her for the trip, he had to make the journey between the drydock and his shop either by automobile or aeroplane.
"Tom Swift and his Undersea Search or, The Treasure on the Floor of the Atlantic"
Victor Appleton
The condition of the boats was such that all of them had to be put in drydock, and it was several months before some of them could be put in condition for use.
"Kelly Miller's History of the World War for Human Rights"
Kelly Miller