Real Sailing Characteristics

[Rik81]

To amplify the question a bit: It seemed to me in reading through the documentation that the "movement rate" (how many hexes a ship would move in a single turn) was not at all affected by the "size of the ship". Thus a big "ship of the line" 3 master, wouldn't move any further (more hexes) that a lowly ketch. (Assumption here that both boats have the same aspect to the wind.) Did I mis-read, or is this a correct interpretation?