7383 Surface or layer code [C] Desc: Code specifying the surface or layer of an object. Repr: an..3 1S Side one The location is side one. 2S Side two The location is side two. AA On surface To indicate that the entity being specified is on the surface. AB Off surface To indicate that the entity being specified is off the surface. AC Soluble Specifies that the surface/layer/position being described is the soluble portion. AD Opposite corners The surface or layer of the product being described is the opposite corners. AE Corner Diagonals The surface or layer of the product being described are the corner diagonals. AF Port The left-hand side (looking forward) of a ship, boat or aircraft. AG Starboard The right-hand side (looking forward) of a ship, boat or aircraft. AH Tooth facial surface Surface of a tooth directed toward the face and opposite the lingual surface. AI Tooth incisal surface Surface of the tooth relating to the cutting edge of the anterior teeth, incisors or canines. AJ Tooth distal surface Surface of the tooth toward the back of the dental arch, or away from the midline. AK Tooth buccal surface Surface of the tooth pertaining to or around the cheek. AL Tooth occlusal surface Surface of the tooth pertaining to the masticating surfaces of the posterior teeth. AM Tooth lingual surface Surface of the tooth pertaining to or around the tongue. AN Tooth mesial surface Surface of the tooth toward the midline of the dental arch. BC Back of cab The location is at the back of the cab. BS Both sides The location is both sides. BT Bottom The location is on the bottom. DF Dual fuel tank positions The location is in the dual fuel tank positions. FR Front The location is in the front. IN Inside The location is in the inside. LE Left The location is on the left. OA Overall The location is overall. OS One side The location is on one side. OT Outside The location is on the outside. RI Right The location is on the right. RR Rear The location is in the rear. ST Spare tyre position The location is the spare tyre position. TB Tank bottom The location is at the tank bottom. TP Top The location is on the top. TS Two sides The location is on two sides. UC Under cab The location is under the cab.