Yacht Escort Ships 173' "SuRi" Fierce Contender For Refit Of The Year! When the owner of the 50 meter Hakvoort “JeMaSa” decided he needed a support vessel, his client brief included those requirements typical of the shadow boat concept: a commercially certified helicopter deck with a hangar offering storage for the aircraft and the usual assorted of tenders and toys. During the contractual discussions on board JeMaSa with the client, the build team learned of some additional necessities. Although the client owned an A-Star helicopter, his pilot required that hangar be constructed to accommodate the largest Sikorsky S-76 aircraft plus 2 additional feet above the rotor head. Private cabins were spec’d for the pilot and captain, underwater lights on the transom added to the list, plus a full beam owner’s suite, 3 guest cabins, full steam room, massage room and gymnasium. Suddenly the project was taking on the flavor of a considerable yacht project rather than a shadow vessel, and the answer was... YES! In attendance at the design meeting were Stan Antrim, inventor of the shadow boat conversion concept and his naval architect, Boris Kirilloff, who teamed with Stan to deliver the first offshore supply vessel (OSV) to yacht support vessel conversion for the owner of Lady Lola. Stan founded Shadow Marine and again in association with Boris and Stan’s wife Mary Jane, the interior designer; they built 2 more shadow vessels. Stan and Mary Jane now own Yacht Escort Ships (YES), the only company to deliver fully IACS classed yacht support vessels. Kirilloff & Associates remain as YES’s technical office for engineering and naval architecture.