Possible Clues:

• Loudly sets off with crews having cool talent for trading
• Spies man with lash developing flogging skill
• One taking orders on vessel selling sand to the Arabs
• The trick to selling small drinks to Joe from dispatch
• Selling sand to Arabs for brewer perhaps in foreign police force is all the rage
• Spanish males engaged in art of commerce
• Talent for shifting canvas, said to act as crew?
• Pass sham line off - an abuse of this?
• Fellow reportedly navigates vessel without agent's involvement