"Goodman needs someone to represent him in a boat race"
We need to take part in a boat race for this mission, on behalf of Warren Goodman. the driver he was planning to use in a charity boat race has been injured, so we have to take his place.
After the cut scene you're in control of the boat and need to pilot it to the start of the race. The race is very easy, you should win comfortably really - you just need to beat the other two racers and finish within the time limit. Once that's done, you've passed this mission.
Reward: G180,000, Respect: 785,000