The entire cargo tank length shall be protected by ballast tanks or other spaces but not fuel or cargo tanks as follows:
Wing shall extend from the deck to the top of the double bottom tanks, having a minimum breadth “w”, where w= 0.5+DW/20000m, however ‘w’ cannot be less than 1m and need not be more than 2m.
Double bottom tanks having height “h” where h=B/15, shall be provided below the cargo tank space. This distance ‘h’ shall be measured at right angles to the shell plating and prevail upto a height of 1.5h above the bottom shell plating.
Where ‘h’ and ‘w’ are different, at the turn of the bilge, ‘w’ shall prevail at a height above 1.5h from the bottom shell plating.
