Factors affecting choice of BWTS
From the moment the Ballast Water Management Convention was adopted in 2004, shipowners have been well aware that at some point they would need to fit a ballast treatment system to new and existing vessels unless the ship in question was to be scrapped before the implementation date. Some others would have been aware of the possibility that an exemption might be possible under the Same Risk Area rules but will have been frustrated to see little official action in this regard. Because of the different regulatory regimes, owners that trade to the US will already have been obliged to fit ballast treatment systems but the number of such ships represents only around 10% of the world fleet. Even taking into account the unexpected extension allowed by the IMO in 2017, it is now time for their owners to consider choosing a system and take account of the many factors that will influence the final choice. With such a wide choice of systems and technologies there is almost certa...