Well, it was a design that they had requested, and the team who'd built it were several miles away by then, busy laying track.
Yeah, I also though a man in a canoe would have been a useful addition, or even an open canoe so Dick could have travelled by water as well... staying in contact with the boat and making use of his life jacket.
Something that Jenny (or any of the other volunteers might be able to answer), I did wonder how much practice/preparation the crews got in laying the track before hand, or what detailed planning of the route was done before hand.