block model

noun3

1. •
   A model of a network made by dividing it into blocks
2. •
   A scale model of a ship to be built, showing the vessel's water line.

   • ...the young shipwright is next desired to prepare a block model to the timbers, which, if correctly proportioned, will displace water equal to the weight of the vessel... — 1827
3. •
   A simplified model of a ship with flat sides.

   • To show more clearly the relation of the block model to that of the actual ship, I have selected No. 4 in the Table... — 1880