Cargo stowing arrangement

Claim 1

IN A DRY CARGO NAVIGABLE VESSEL HAVING A LOWER HOLD ACCESSIBLE THROUGH HATCHWAYS IN ''TWEEN DECKS, AND HAVING A SHAFT TUNNEL, CARGO STOWING MEANS, FOR SUBDIVIDING THE LOWER HOLD VERTICALLY, COMPRISING, IN COMBINATION, A PLURALITY OF BEAM STEPS SECURED IN LONGITUDINALLY SPACED RELATION TO SIDE FRAMING OF THE VESSEL AT A COMMON LEVEL INTERMEDIATE THE HEIGHT OF THE LOWER HOLD; A PLURALITY OF BEAM SUPPORTS ARRANGED ON THE SHAFT TUNNEL IN LATERALLY SPACED RELATION TO SAID BEAM STEPS AND EACH SUBSTANTIALLY ALIGNED, LATERALLY AND HORIZONTALLY, WITH A RESPECTIVE BEAM STEP; A PLURALITY OF VERTICALLY EXTENDING PINS EACH ROTATABLY MOUNTED IN A RESPECTIVE BEAM STEP; A PLURALITY OF HORIZONTALLY EXTENDING PINS EACH SECURED TO A RESPECTIVE VERTICALLY EXTENDING PIN FOR ROTATION WITH THE LATTER ABOUT A SUBSTANTIALLY VERTICAL AXIS; AND A PLURALITY OF DECK SUPPORT BEAMS EACH HAVING ONE END SECURED TO A RESPECTIVE HORIZONTALLY EXTENDING PIN AND ITS OPPOSITE END ENGAGEABLE IN A RESPECTIVE BEAM SUPPORT, WHEREBY SAID BEAMS MAY BE SWUNG, RELATIVE TO THE ASSOCIATED BEAM SUPPORTS, ABOUT BOTH VERTICAL AND HORIZONTAL AXES FOR EXTENSION BETWEEN A RETRACTED POSITION, IN WHICH EACH BEAM LIES AGAINST THE SIDE FRAMING OF THE VESSEL AND AN EXTENDED POSITION IN WHICH EACH BEAM EXTENDS FROM ITS RESPECTIVE BEAM STEP TO THE SHAFT TUNNEL SO THAT HATCHBOARDS MAY BE LAID OVER THE EXTENDED SUPPORT BEAMS TO PROVIDE A FIRM DECK FOR CARGO STOWAGE INTERMEDIATE THE HEIGHT OF THE LOWER HOLD.