I know a guy who works on oil tankers and he was doing a gig in Africa. As he told it, basically every port there has a deal where you have to smuggle oil or stuff for them and tricks to get through standard inspections etc., etc.

So a new captain comes on board and first port they get in he refuses to do this - they refuse to let them in the port - they were out at sea without resupply 20 days and running out of food... the company had to fly in a different captain to relieve this guy and he told me by day 2 weeks in they were already joking around how the captain could have an accident ...