diff --git a/Chapter_6.Rmd b/Chapter_6.Rmd
index b357bb5..6a0bc80 100644
--- a/Chapter_6.Rmd
+++ b/Chapter_6.Rmd
@@ -62,7 +62,7 @@ n_phase <- nrow(dt)
 phase_axis <- seq_len(n_phase)
 phase_labels <- rownames(dt)
 series_center <- seq_len(series_col)
-max_ship_width <- 5
+max_ship_width <- 3.5
 ship_widths <- as.matrix(dt) / max(dt[, "Corrugated"]) * max_ship_width
 plot_left <- series_center[3] - max_ship_width / 2
 plot_right <- series_center[3] + max_ship_width / 2