Murray HI,
I bet Eric will answer this much better but here is some copied text from one of the articles I have collected. I just took some so it would not be a book to read. I also believe that Lou Codega as a big factor in this hull design used his skills and knowledge to create this hull and yes after a work boat but NOT a copy of any paticular one....Eric can correct me if I am wrong here.
Any way here is the parts of the one article........Story by Bill Parlatore on July 23rd, 2012
When you want something bad enough, chances are you’ll find a way to get it or make it happen. It’s that way with life, and it’s the same with boats. If you really want a particular boat, I mean really want a particular boat, other things will fall by the wayside and other priorities changed to accommodate getting that boat.
Perhaps that is a good way to begin our story about the Great Harbour 37.
Many hours of deliberation and tire-kicking brought the Danielsons to the realization that they really had only three core parameters for their new boat. Three requirements that would, despite other considerations, allow their dream to come true:
1. The boat had to be capable of safe travel up the Amazon River. It would need shallow draft and long, self-sufficient range. If the boat could make it safely up the Amazon they figured, it could handle any other inland waterway with ease.
2. The boat needed to be a good platform for cruising the Caribbean. With long, bluewater voyages now a thing of the past, Gary and Sue felt their future cruising grounds would be shorter trips in the Caribbean, or other tropical destinations-which translated into having the range and seaworthiness to handle 3/4 days in open ocean travel in rough seas. Not hurricane travel, not in ultimate storms, no major nasty stuff thousands of miles from land. They had already been there, done that…
3. The boat had to readily convert into a fulltime office for Gary’s law practice-a suitable office for at least three people, complete with case files, law books, filing cabinets, fax and telephone lines, computers, desks, chairs, and all the trappings of a modern office. A tall order indeed, especially when you consider the year-round weather conditions of the Great Lakes.
Finding a proper passagemaker and office was quite a challenge. Gary and Sue went ahead and determined the interior space requirements for Gary’s office, which they then had to fit into a boat small enough for two people to handle in all conditions. The Danielsons looked around at various production options. They considered a Marine Trader 50 (but felt it wouldn’t be up to the rigors of the Amazon), a DeFever 49 (not an easy conversion into an office), a Nordhavn 46 (also a difficult office conversion), and a Krogen 42 (it just didn’t work for them). They also found that suitable motorsailers needed to be at least 60′ overall, and there was no way they wanted a boat that big.
But they kept looking…
A Design Is Born
During the search, Gary became intrigued by Jay Benford’s Island Packet 35, a vessel that seemed a smaller version of the Florida Bay Coaster (a line of steel freighter-like coastal cruising boats that were built some years back).
Gary and Sue talked with Benford about their requirements for a new boat-one with character, one with space, but in an overall size that would fit their small-is-better philosophy.
There was even some talk that this new boat might be a candidate for a production series, although the design was far from complete, the engineering had to be done-and there was no one yet identified to build the boat.
Several versions of the concept design were drawn, and the Danielsons stayed keen on the project, despite the growing commitment of involvement that is the nature of a custom boat. They investigated building in steel or fiberglass for the hull, but chose fiberglass for its longevity and low maintenance.
This decision led to the selection of a boat builder-Ken Fickett and his Mirage Manufacturing of Gainesville, FL, an extremely experienced shop with expertise in high quality fiberglass boats, aircraft, and fiberglass components. Ken was excited by the boat’s design, which appealed to his own plans for future family cruising.
As often happens in the custom boat business, the project stretched on for months, and some of the players changed. Naval Architect Lou Codega of Arlington, VA, came onboard to do the engineering work on what ultimately evolved into the Great Harbour 37, and Reuben Trane joined the team to market the completed boat, as well as manage the construction of the first hull. Reuben had been instrumental in the Florida Bay Coaster project, and, as a result, had a lot of experience in developing interior layouts that took advantage of the boat’s unique volume.
With the team now in place, the project really started to come together, and building the first Great Harbour 37 began in earnest.
A Wolf In Sheep’s Clothing
It is NOT a toy boat,” Lou Codega told me. “The boat was never intended to be cute. All of the features we used were brought to the boat because they work, features commonly found on workboats.
“The hull reflects a strong workboat heritage, with fine waterlines forward, deep sections amidships, and a flat run aft. I think this is appropriate, as a workboat must earn its keep 365 days a year and care for its crew, regardless of weather. She is easily driven and comfortable in a sea. Scantlings are to commercial standards.
“The machinery and systems are all intended to be simple, accessible, easily maintained, and redundant.”
The hull, bulkheads, soles, and decks were, in fact, built to ABS workboat standards. The GH37 is not a borderline cruising boat with maximum interior room priced to sell, but a serious workboat- tough cruising boat, with a price that is kept down by eliminating frills, fancy teak brightwork, and complex machinery. The details of the boat were kept simple-the team concentrated instead on developing the boat to use as much beam as possible that would fit in a normal slip, while keeping the overall length down to a manageable and less expensive size. (Per foot slip fees can really add up.)
Want some examples of the workboat strength of this boat? A strong, unitized structure that doesn’t flex and twist in a seaway, with acres of hand-bonded fiberglass…below the rubrail the solid glass hull is laid up with 12 layers of fiberglass (the outer layers glassed with vinylester resin), and there are numerous bottom longitudinals of foam core. This translates into a hull that is minimally one inch thick; in many sections, over two inches thick.
Above the rubrail, the hull is cored with high-tech Nida-Core™, a structural polypropylene honeycomb coring material impervious to rot, water absorption or migration. There are 4 layers of non-woven biaxial fiberglass 2408 cloth on each side of the Nida- Core™ to create a balanced laminate.
The superstructure of the pilothouse has 2 layers of biaxial cloth over each side of the core. (All vertical surfaces use 3/4″ Nida-Core™, and all horizontal areas are constructed with 1-1/8″ Nida-Core™.) This decreasing laminate schedule, and the resulting upper-structure weight, contribute to the overall stability of the vessel, while all areas of the boat are more than tough enough to handle the demands of full-time cruising.
All cored surfaces are also vacuumed-bagged for maximum bonding of all materials. This is advanced glass work indeed, but then again, Mirage also builds airplanes and large highspeed sportfishing boats. Needless to say, Fickett’s team builds a strong boat, with stability and strength where needed.
Any way Murray this should hold you over until some one with more knowledge can answer your question. Toooo Me they just make good sense....
Merry Christmas
Jim