The latest worldwide oil spill statistics for 2016 are now available from ITOPF. While things are getting better, oil spills still happen, in fact:
“In the seven year period 2010-2016 there have been 47 spills of 7 tonnes and over, resulting in 39,000 tonnes of oil lost; 83% of this amount was spilt in just 10 incidents.”
Quite staggering really. You can read their full oil spill statistics report here: http://www.itopf.com/fileadmin/data/Photos/Publications/Oil_Spill_Stats_2016_low.pdf
The ITOPF report notes that “the vast majority of spills are small (i.e. less than 7 tonnes) and data on the number of incidents and quantity of oil spilt is incomplete due to the inconsistent reporting of smaller incidents worldwide.” Of those incidents spilling <7 tonnes – 40% involve loading or discharging.
Make up your own mind if you think STS is safe.