Page 18: of Marine News Magazine (June 2018)

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INSIGHTS it. Container AT/B’s can run the gamut from simple deck LNG fuel tender between locomotives and connect the barges with lashings to fully cellular barges like Minyan’s fuel to the locomotive via vaporizer/hose arrangement, the

Chemitainer design. Units capable of ocean and rive tran- U.S. Coast Guard has been opposed to such arrangements sits will have to be a different kind of animal to allow for where large fuel amounts are carried on the barge. One of both. Then you have canal-constrained services like the our clients has developed a safe breakaway system to allow

NY Barge Canal, where waterborne container moves are that between and AT/B tug and a barge, but the USCG limited not only by draft but by the small locks of the ca- has not approved such things. Certainly, we have developed nal. Here, highly specialized high-value container moves tugs that can carry LNG or CNG fuel, at least conceptually. (such as chemicals) may be feasible. A NY Barge Canal- Thus far, no one is biting , but that may yet happen. capable AT/B could run from New York City to Chicago

For the larger coastwise units, is Tier 4 the law now, without any towing, but the cargo would need to be high and if so, what’s the preferred method to achieve that value and move only from April to late November. Those standard in newbuild tonnage today? problems do not exist on the great river systems.

We have designed Tier 4 AT/B tugs and one is nearing completion right now for Reinauer. Considering the ways

Are you seeing a (more pronounced) move towards a diesel can be made T4 compliant, you have three basic

LNG as a fuel in this sector? Has the bunkering dis- cussion – midstream versus alongside advanced any choices. You can use an EGR engine, you can use an SCR- further with the Coast Guard?

based engine with urea, or you can burn LNG in some cases.

There is no big move in LNG fuel for AT/B’s as yet that With EGR, there are questions of wear and other issues with we can see – unless the barge is carrying LNG. We have reintroducing exhaust gas back into the cylinders. The Rein- designed such tugs for Argent Marine, and others, where auer tug has GE T4 engines and they (GE) have the most

LNG is the cargo. LNG has not really caught on in the US experience with this, with a large number of locomotive in as a propulsion fuel for tugs in general, let alone AT/B’s. US service to draw experience from that are