Double hull

"motion of the void of ships"

This double-layered structure is designed to limit the water income in case of underwater attacks or violent ramming. This is one of those pages which has not yet been completely clarified in relation to both the drawings and the comments. There are three drawings on the sheet, all of them representing nautical items. Besides the double hull the drawings show: a machine with a Greek origin called atameganta, which was used to spread water; a small circular vessel with a turret, captioned with a note which is difficult to interpret.
Manuscript B, sheet 11 r. about 1490