In  1977, while living in the little yellow house by the River Vaipoiri, a different boat came to paper and then lived on as a dream. 

We had SEMINOLE anchored off the river mouth. She was a fine vessel, built with love and attention, cared for, and well sailed.  When we started her we were  sailing savvy but naïve about the sea. We chose to build a ‘traditional’ design, from cheap plans in a magazine. The Atkin’s ‘Ingrid’ design would turn out to be wet and slow, and after sailing her for several years there were endless thoughts of how to do it another way, even to the point of threats to take an axe to  the interior and start fresh.

Patrick  Humbert was my friend though all of the adventure beyond the end of the road. We lived the barefoot vagabond life and dreamed of new boats. His  own was lost on a Tuamotu reef so his madness was driven by being boatless. We would spend lazy hours in deep discussion about making  boats with the fewest moving parts, the simplest of everything, and even limited use of metal. West System was getting rolling around then and boats of laminated wood and epoxy were getting popular and easier to build. So we drew dreams of cargo space, deck living, shallow draft, up-the-river kind of craft. The junk rig was logical and would be cheap and could be repaired anywhere with just about anything you can find. There were asymmetrical lee-boards externally like Dutch canal boats. We even fantasized electric power or none at all. All a little crazy for 1977.

In  2014, an early sketch reminded me of all the reasons why Patrick and I  had tripped out on the different concept. Lots of quick drawings evolved until the scale ruler and drafting sticks became necessary. Lines and sections could be used to develop a design from a crude but experienced guess. We drew and erased and worked up to a scale that helped make it  easier to visualize. When it looked real enough I called Jim Antrim because we had earlier meetings about other boat fantasies. He’s a patient fellow, and I knew there was no shying away from unusual design projects. Jim having designed Patrick’s TE MARAMA catamaran was a real connection also.

We found a fantastic guy, Cree Partridge, owner of Berkeley Marine Center,  who was willing to build the Rosie G, and as of January 2019, molds were being made for the beginning process.  

The brief:



Outside ballast, preferably cast lead for grounding

Modern junk rig with 200 lb carbon mast and engineered sail structure

Cockpit to galley/nav/dining same level feel. No ladders.

Forward flush deck

Scow bow 8’0” wide 2’0” back

Electric power

Large deck hatches

LOA 42’0”

Beam 14’0”

LWL 41’0”

Draft 4’0” (7’6” board down)

Displacement 20,000 lb

Ballast (cast lead) 7,500 lb

Sail Area 842 Sq Ft

  • ROSIE G will be easy to board from a dinghy or swimming. 
  • She will have a ‘junk’ rig with a tapered carbon mast that should be around two hundred pounds. 
  • The ballast keel is cast lead and will be able to be grounded and stand the boat. 
  • The cockpit and galley/nav/dinette are on the same level... no  ladder... and the doghouse windows will open to make the space airy when cooking/eating/hanging about. 
  • Volume forward in the beamy shape creates a huge space (appox 13’ x  8’) that can have any choice for use, from light cargo to private cabins. 
  • A four foot square opening hatch opens the world outside when at anchor. 
  • The hull and structures have the finish of a good quality commercial fishing boat built on a male mold using CoreCel and  glass/epoxy.  




Fifteen years ago,  a red cloud kelpie was born in Western Australia. Originally a desert dog, Rosie came to Maui, Hawaii when she was two in 2006.  She adapted to island life including sailing on SV Cornelia.  She quickly took ownership. Over the nine years we've had Cornelia, it was becoming more difficult for Rosie to get on and off, and down below. 

Rosie wanted her own boat. The SV Rosie G.

She wanted her own blog to take you on her boat building journey.  She also wrote a book called Rosie's Perspective, Dog Only Knows

Just click on the button below to buy it!



Rosie was getting on, like all of us.  And like us, she wanted to get on and off easily, walk from the cockpit into her doghouse without climbing over anything, go "down below" in two easy steps. 


Rosie had a great life, spending almost 10 years being on a boat.  She passed over the rainbow bridge Saturday, 18 May 2019,  the first day of  her 16th year. While she isn't physically with us to see her boat get finished, she told us before she left us she would definitely be keeping an eye on the progress of her boat.      

Rosie don't roll!

The  SV Rosie G will be stable, go fast and be dry.  There won't be any wires to trip over on deck.  And it will be roomy inside, plenty of places to find comfortable cubbies to snuggle into for a nap.




Designed by Jim Antrim and built by Cree Partridge of Berkeley Marine Center, it is easy to board from a dinghy or swimming. The hull and structures have the finish of a good quality commercial fishing boat built on a male mold using CoreCel and glass/epoxy.  

Scow Bow provides a soft ride, dry decks, long straight waterlines, massive volume and high stability.  

To see the progress of the Rosie G, 

go to Rosie's blog.



The  main (and only) sail is a ‘junk’ style. The sail will be very light  with round carbon tube battens, boom, and head spar. Modern spectra  sheets and halyards and ‘soft’ construction details make the sail easily  set with the single electric/manual winch.

Instead  of woven jute or hemp panels, bamboo battens, solid wooden masts, and  coco fiber lines there is a sail made from varied weights of Dacron material, battens made from windsurf masts of 100% carbon, a tapered  carbon tube mast from GMT Composites with sheets, halyards, and control lines running in the lightest blocks  and fittings. It’s very winglike and controllable, lightly loaded, all sheeting from  the leech, full twist control with low tension. 

The entire sail can be swung on the mast to ‘square it and balance the loading, thereby helping to balance the boat.  A  junk rig has few parts and low loads.  It is uncomplicated and easy to  fix anywhere, no rigging to fail, infinitely adjustable and makes  totally aerodynamic sense if you understand all 

power comes from angle of attack.



The ballast keel, from MarsKeel

is 7405 lbs of pure cast lead with 

3% antimony and keel bolts are 

316 Grade Stainless Steel.  

The keel can be grounded 

and stand the boat.

The perfect grounding shoe.



The  cockpit and the galley/nav/dinette are on the same level... no ladder... and the doghouse windows open to make the space airy when  cooking, eating, and hanging about.

Volume forward in the beamy shape creates a huge space (appx 13’ x 8’) that can have any choice for use, from light cargo to private cabins.


A four foot square opening hatch brings the outside world in when at anchor, and serves to load large items if desired. 



QT20 is the electric power plant (20KW) and has excess power for necessary maneuvering.


The  Max Prop can be feathered for lowest drag, or tricked into staying in reverse, which will charge the batteries using the motor regen capability. 

At  the core of the electric dream is a small fuelless generator made with Neodynium 52 magnets and copper coils. When there is a constant supply of electricity available there are endless options for comfort and safety.




A  naval architect, Jim's design portfolio is one of the most diverse in the industry, and includes record-breaking custom multihull and monohull sailboats, popular production boats, wing-sail assisted  motor-catamarans, and recently, a solar-powered unmanned electric craft.  Always keeping an eye toward efficient innovation, Jim's expertise in composite engineering yields high-performing and weight-effective structures. 



Berkeley Marine is the center of custom yacht construction in the San Francisco  Bay Area. Racing yachts built at the yard are generating considerable buzz for their advanced designs, and for contributing to the rebirth of a local industry. The facility's dedicated, experienced design and  construction team is the key to its success. Construction is led by long-time boat builder Cree Partridge, whose former company P-Squared Yachts, built dozens of high-performance racing yachts in Southern California throughout the 1980's.



For  38 years MarsKeel has united it's passion for sailing with it's vast  technical experience supplying quality keels to custom yacht builders and sailors from around the world, from the United States to  South Africa and Turkey. With over 100 million pounds of castings over three decades, their casting experience and metallurgical knowledge places MarsKeel Technology™ as the worldwide industry leader.  Kevin Milne, Founder and President, has over 30 years of Metallurgical Casting experience, extensive knowledge of keel design and marine industry experience.



GMT Composites specializes in custom carbon solutions for any size sailboat, powerboat, or yacht. They have been building custom carbon composites since 1984; their range of projects is remarkable, and their experience is unmatched. From small decorative switch plates, to giant radar arches requiring absolute precision, their expertise can be  applied to a huge range of custom carbon marine products.



Electric Yacht Pacific provides the finest affordable electric propulsion systems, complete systems engineered, built, tested and ready to install for boats from 2500lbs to 50000lbs. Electric Yacht Pacific has warranted quality marine systems with over 400 installations conversions from Alaska to California to Hawaii.   



AdvanTec is a collaboration of brands, each brand with a long service to marine  and industrial clients from around the globe. Diamond Sea Glaze designs and manufactures custom windows, doors, and hatches for customers around the world. DSG closures have quality built in,so everything else stays out. Each order is manufactured separately from beginning to end in their 80,000 sq. ft. vertically integrated plant just outside Vancouver, Canada; one of a few closure manufacturers in the world that insists on processing it’s own glass so they can ensure optimum quality control.



Ronstan is a world-leading manufacturer of sailboat hardware, rigging  components, sailing wear and accessories created through innovative thought and real-world testing. They offer a full range of yacht and dinghy sailing products including blocks, sheaves, travellers, furlers, rope cleats, stainless steel fittings, sheet and halyard winches and much more.  No matter whether you are a racing sailor or offshore cruiser, their global team experience allows them to offer the perfect   sailing product solution to meet your needs. Based in Melbourne, Australia,  Ronstan's international network includes offices and distribution centres throughout the United States, Europe and Australasia. Their products have become the sailing equipment of choice for racing dinghy classes, including the International Moth, as well  as many high-profile offshore racing programs like the Volvo  Ocean Race fleet. If you have a sailboat, you need Ronstan.



ANDERSEN  Winches are all about Design and Engineering. They employ  state-of-the-art manufacturing technology,  and after half a century of designing and manufacturing ANDERSEN Winches feel they've earned the right to be proud.  ANDERSEN Winches has over 50 years of experience, and their 150 employees are dedicated to quality manufacturing. Their procedures are based on the toughest demands in the business, and their engineers strive constantly to improve their products even further,  stretching from dedicated manufacturing to a 3-year factory warranty and reliable service worldwide. 



COPPERCOAT  is possibly the most powerful and long lasting anti-fouling available today. Developed in the 1980’s and available to the public since 1991,  COPPERCOAT successfully protects tens of thousands of boats saving their owners time and expense.

COPPERCOAT is the combination of a  specially developed zero VOC, water miscible epoxy resin and 99% pure copper powder (not cuprous oxide). Each liter of resin is combined with 4.4 lbs of ultra fine  atomized copper powder, making COPPERCOAT the strongest copper based anti-fouling available.  Indeed no other anti-fouling exposes as much active copper to unwanted marine life as COPPERCOAT.

The  average COPPERCOAT customer world wide gets about 10 years of  protection before they need to do their first touch-ups.  That doesn't mean 10 years is a magic number; if you are in a mild fouling location it might be 12 years or more before you need to do anything. And if you are in a high fouling area and using an aggressive pad to clean the waterline it might be only 9 years.