Contract work for the UN spraying rivers to kill Black Flies.....the contract was held by different companies over the twenty or so years the contract lasted.
Straight civvie flying it was....and we rarely carried a customer along....departed on Monday Morning from Bobo...and returned late on Friday...or Mid-day Saturday. Night stopped in towns...and hit fuel stashes during the day. Hand pumped all our fuel and chemical. No radio contact except when taking off or landing at Bobo....and maybe one other airport during the week.
We also had a Pilatus Porter rigged for spraying as well along with the Jet Rangers.