C=coach A= athelete
C1A1, C2A2 C3A3 start off the same side. A2 crosses with A1. A2 returns but leaves A1. Boat is with the starting side. C1, C2A2, C3A3((RIVER)) A1
A2 crosses with A3, leaves A3, and returns. Boat is on the starting side and A1 and A3 have crossed.
Now the arrangement is C3 C2A2 C1((RIVER)) A1, A3. The boat is with the coaches.
C3 and C1 cross. Now just C2 A2 remains. C2A2 ((RIVER)) C3A3 C1A1. However, the boat is with C1A1's side.
C1A1 returns with the boat, so now it is C2A2 C1A1 ((RIVER)) C3A3. Boat with C1A1's side.
C1 and C2 cross. Now it is A2, A1 ((RIVER)) C3A3, C2, C1. Boat on C1 and C2's side.
A3 crosses. A2,A1,A3((RIVER))C3,C2,C1. Boat is with A3's side.
A2 and A3 cross. Now it is A1((RIVER))C3A3, C2A2, C1. Boat with C1's side.
C1 crosses. Now: A1C1 ((RIVER)) C3A3, C2A2. Boat with A1C1's side. A1C1 Cross, YAHOO!