The manufacturer identification code (MIC) of your craft identification number (CIN or HIN) is GMM. This MIC (GMM) stands for the company name Marathon Boat Group Inc which is currently In Business. This boat manufacturer code has other company names (GMM sometimes goes by these name(s) if applicable: Galleon Marine (oob), , , or ). This could happen if the US Coast Guard reissued the MIC to a new company after the first went out of business.
This company (Marathon Boat Group Inc) is owned by David Porthouse and is located at P.o. Box 549 in Marathon state of Ny. It manufactured this vessel and placed your HIN or CIN on the hull. This Boat maker is not owned by a parent company. Marathon Boat Group Inc has started making boats, yachts and other watercraft as of 9/17/1996.
More details at the US Coast Guard.
The US Coast guard provides this comment about this watercraft manufacturer: Previously Assigned To Galleon Marine, Pob 747, Chico Ca 9170, Mso Los, Type 15, Oob 790815. Marathon Acquired Assets Of Grumman (gbm). 12/28/2001 Update Per Rni.