The manufacturer identification code (MIC) of your craft identification number (CIN or HIN) is GDF. This MIC (GDF) stands for the company name Greenbank Boatworks which is currently Out of Business. This boat manufacturer code has other company names (GDF 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 (Greenbank Boatworks) is owned by Michael W Alberts and is located at 19600 Stratford Road in Detroit state of Mi. It manufactured this vessel and placed your HIN or CIN on the hull. This Boat maker is not owned by a parent company. Greenbank Boatworks has started making boats, yachts or other watercraft as of 1/2/1997 and went out of business on (7/10/2005) in the following country: USA.
More details at the US Coast Guard.
The US Coast guard provides this comment about this watercraft manufacturer: Imports Wooden Boats From Canada Oob Per Ppg 7/10/2005.