OCEAN GUARD SMALL STANDARD DUTY FOAM FILLER FENDER Marine Fender International, Inc. manufactures the Ocean Guard%u2122 SSD- Small Standard Duty foam filled fender exclusively. The Ocean Guard%u2122 SSD fender design is the finest and toughest foam-filled fender constructed in the world today that meets the needs of vessel and ships. The Ocean Guard%u2122 SSD exemplifies state-of-the-art technology, design and function.