The manufacturer identification code (MIC) of your craft identification number (CIN or HIN) is HMU. This MIC (HMU) stands for the company name Sun Mfg Co which is currently Out of Business. This boat manufacturer code has other company names (HMU sometimes goes by these name(s) if applicable: Hornett Marine, , , 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 (Sun Mfg Co) is owned by and is located at 940 W 17th St in Costa Mesa state of Ca. It manufactured this vessel and placed your HIN or CIN on the hull. This Boat maker is not owned by a parent company. Sun Mfg Co has started making boats, yachts or other watercraft as of and went out of business on (8/15/1979) in the following country: USA.
More details at the US Coast Guard.