Though we seldom come across this now, introducing slops and thus contaminants into the fuel delivery will reduce the actual fuel amount and also can create engine problems down the line.
Unfortunately this cannot be detected until the representative fuel samples have been tested by an independent fuel testing facility.
Always witness and collect samples by continuous drip method i.e. the sample to be drawn continuously throughout the bunkering delivery period
It should be a practice onboard to isolate the fuel delivered to separate tanks and not to be consumed until such time the fuel testing report gives a clean bill of health.
Fuel contamination amongst other things can create problems with the fuel injection system and exhaust valves with costly repairs.
Remember whenever in doubt or have concerns always issue a letter of protest.
Kaivan H. Chinoy is the Founder and Principal Marine Surveyor of AVA Marine Group, owners of Petro
Inspect and The Bunker Detectives.