add boat trip to services

rules.tex

@@ -569,6 +569,12 @@ They can, however, drag items with up to a \gls{weightrating} of up to 10 points
 
   Illegal Murder & 10sp \\\hline
 
+  \textbf{Boat Trip} & \\\hline
+
+  Popular trading route & $2D6-2$\gls{sp} (reroll each day) \\
+
+  Standard stream & $3D6$\gls{cp} \\\hline
+
   \textbf{Guide} &  150 cp/ day \\\hline
 
   Dangerous area & 1sp \\