Cross-Section of Schooner Bertha L. Downs, at the Main Mast

Cross-section of the four-masted schooner Bertha L. Downs, at the main mast, looking forward. This view shows the keel, keelson, frames, planking, ceiling, hanging knees, deck beams, and decking.

Image drawn by Sam Manning for the book The Schooner Bertha L. Downs, written by Basil Greenhill, 1995, p. 68.