The manufacturer identification code (MIC) of your craft identification number (CIN or HIN) is HDR. This MIC (HDR) stands for the company name Hydro-sled Mfg Co which is currently Out of Business. This boat manufacturer code has other company names (HDR sometimes goes by these name(s) if applicable: , , , 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 (Hydro-sled Mfg Co) is owned by V Hampton and is located at Po Box 3162 in S Padre Island state of Tx. It manufactured this vessel and placed your HIN or CIN on the hull. This Boat maker is not owned by a parent company. Hydro-sled Mfg Co has started making boats, yachts or other watercraft as of 4/12/1984 and went out of business on (1/10/1990) in the following country: USA.
More details at the US Coast Guard.
The US Coast guard provides this comment about this watercraft manufacturer: Nothing Listed In S. Padre Island Telephone Book-29jun891/90 Oob Per Mso Cor.