2012 marks the 100th Anniversary of the Sea Scouts, but unlike the tons of promotional materials issued for the BSA Centennial celebration, there only appears to be a few special items so far.
Centennial Long Cruise Patch
IRVING, Texas – When Eagle Sea Scout Paul Siple returned from Antarctica, the National Sea Scout Committee presented him with a Special Long Cruise Award; the border around the patch was gold instead of the standard red. This year the National Sea Scout Committee has authorized the reissue of this historic emblem in celebration of the Sea Scouts, BSA Centennial.
Centennial Lapel Pin
Centennial Patch
Centennial Burgee
I thought there was going to be a Sea Scout Centennial ship flag available for sale, but other than the prototype flown on the USS Hornet at the Ancient Mariner’s Regatta last year, I haven’t seen any made available. See this link for a photograph.
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DISCLAMER:
ScoutPatchCollectors.com It is not officially affiliated with the Boy Scouts of America, the Girl Scouts of the USA or the World Organization of Scout Movements.
Some additional Sea Scout Centennial items available nationally:

Gold Centennial Sea Scout Award
Can be earned by Sea Scouts and leaders by completing special requirements during 2012.
Sea Scout Centennial Flag

They made these after all, and they’re available to any ship that participates in an approved Sea Scout Centennial event.