hatch covers Folding type, Multi Folding type, single panel Pivoting type, Piggy Back type, Pantoon type tween decks and grain bulk head systems Mariner tweendeck systems offers wide range of cargo carrying capabilities on board ship. gantry cranes Mariner deck gantry cranes are electro hydraulic driven and 4 wheel drive systems ro-ro equipment external and internal ramps, bow ramp and visor, shell doors, pilot doors, ramp covers, car decks, scissor lifts, internal or external bulkheads deck machinery anchor windlass / mooring winches, mooring winches, aft anchor winches, chain stoppers, SPM chain stoppers, vertical capstans, towing winches, tugger winches and positioning winches. rudder systems high lift flap types, spade types or other special lines with bulbs and etc. steering gears Mariner delivers well proven, robust, easily operable, easy servicing, 2 cylinder ram type steering gears. service, provision & hose cranes Service and provision cranes, freefall lifeboat cranes and tanker hose cranes