Studierende stehen vor dem LC und blicken lächelnd einer Kollegin mit einer Mappe in der Hand nach.

Exercise No. 44: Cargo Ship

Partial Solution 2

b) A Crew has many Sailors (Sailor-#) but only one Steerman (Form-#). A Captain uniquely commands one Crew as one Crew can only have one Captain. Sailors and the respective Steerman work uniquely for one Crew.