| Knowledge Base Rules for Sailing Ships Expert System |
|---|
| # | Rule | Conclusion | Image | Notes |
| 0 | If the number of masts on the vessel is 3 or more
and if there are square sails on all masts
then the vessel is Full-rigged sailing ship. | Full-rigged sailing ship |  | This ship has 3 or more masts with square sails on all masts |
| 1 | If the number of masts on the vessel is 3 or more
and if there are square sails on first 2 masts only
then the vessel is Barque. | Barque |  | This sailing ship has 3 or more masts with square sails on just the first 2 masts. |
| 2 | If the number of masts on the vessel is 3 or more
and if there are square sails on first mast only
then the vessel is Barquentine. | Barquentine |  | This sailing ship has 3 or more masts with square sails on the first mast only. |
| 3 | If the number of masts on the vessel is 3 or more
and if there are square sails on no masts
then the vessel is Staysail Schooner. | Staysail Schooner |  | This sailing ship has 3 or more masts with no square sails present. |
| 4 | If the number of masts on the vessel is 2 only
and if there are square sails on first 2 masts only
then the vessel is Brig. | Brig |  | This sailing ship has only 2 masts with square sails on both. |
| 5 | If the number of masts on the vessel is 2 only
and if there are square sails on no masts
and if the taller of the 2 masts is the the aft mast
then the vessel is Schooner. | Schooner |  | This vessel has 2 masts with no square sails. The aft mast is taller than the fore mast. |
| 6 | If the number of masts on the vessel is 2 only
and if there are square sails on no masts
and if the taller of the 2 masts is the the fore mast
and if tthe aft mast is fore of the rudder
then the vessel is Ketch. | Ketch |  | This vessel has 2 masts with no square sails. The aft mast is shorter than the foremast with the steering position behind the aft mast. |
| 7 | If the number of masts on the vessel is 2 only
and if there are square sails on no masts
and if the taller of the 2 masts is the the fore mast
and if tthe aft mast is aft of the rudder
then the vessel is Yawl. | Yawl |  | This vessel has 2 masts with no square sails. The aft mast is shorter than the foremast with the steering position in front of the aft mast. |
| 8 | If the number of masts on the vessel is 2 only
and if there are square sails on first mast only
then the vessel is Brigantine. | Brigantine |  | This ship has just 2 masts with square sails present only on the first mast. |
| 9 | If the number of masts on the vessel is 1 only
and if tthe number of foresails the vessel has is 1 only
then the vessel is Sloop. | Sloop |  | This sailing boat has only one mast. It has only 1 foresail. |
| 10 | If the number of masts on the vessel is 1 only
and if tthe number of foresails the vessel has is 2 or more
then the vessel is Cutter. | Cutter |  | This sailing boat has only one mast. It has 2 or more foresails. |