30 canon balls? There would be no need for that many beside any canon on a sailing ship. A ship on the line would at best be able to get 3 maybe 4 rounds off. The canon heated up became unusable. The fellow packing the powered would get his head blown off.

Another sailing term someone can research. POSH. Port out, Starboard Home. The term was used in the days of the East India Trading Company. Africa would be on Port on the way there and Starboard on the way home.