It is not so far away. We already have off-the-shelf systems available to eliminate particulates - DPFs. But, many of the current yacht installations simply don't work despite the claims of manufacturers and installers. DeAngelo Marine Exhaust in Fort Lauderdale has an excellent and proven in service solution that no one else has. If anyone else did I wouldn't be here sounding like an infomercial. There are other exhaust treatment systems available from, among others, HUG and Halyard but they are generally very large, breathtakingly expensive and consume a large portion of precious machinery space volume. Most yacht owners are very conservative and either unaware of the issues surrounding exhaust treatment or simply leave the decision of what and how to manage it to their captain and/or engineer who frequently have little knowledge of the state of the art or impending regulatory impacts. They are also leery of "risking" the owner's money on anything they haven't used in the past. Only when things go very badly will they look to new technology. The big players like MTU are investing heavily in aftertreatment systems but for all but the largest (>100m) of newbuilds, it is highly unlikely that we will see their products due to the high cost of hardware and real estate to fit it. Having worked on finding solutions to problems with exhaust emissions on medium and large yachts for several years, I have come to the conclusion that we won't see an affordable and effective solution coming from the major players in the EU anytime soon, and when (or if) they do arrive, they won't be backwards compatible. The large fleet of large yachts already in service won't benefit from R&D programs that are just starting today. I don't mean that existing yachts and the <80m crowd are going to be orphaned but I don't believe an affordable solution is going to come from the likes of MTU and the current suppliers of large and complex treatment systems. Remember, the home computer wasn't invented by IBM.