The hull form has been an evolution of the GV11, with a slightly modified bow shape to make bending easier. Beam has remained nearly the same because the GV11 was as beamy as you could go on a small boat - the GV13 will be a little more comfortable in a chop because it is proportionally thinner. (For those interested in the history of the Boston Whaler™, please visit this page).

Building method:
The construction is epoxy-fiberglass-plywood composite, a second-generation stitch and glue system designed for efficient and fast building.
This building method combines the ease of stitch and glue (plywood-epoxy) with the strength, lightweight, longevity and low maintenance of a high tech composite hull.
The hull material is a fiberglass sandwich with a plywood core.
The builder assembles the hull as a plywood boat first, then builds the outside and inside fiberglass skins to produce a strong composite hull without all the time consuming woodwork associated with plywood on frame.
We specify high performance directional glass and epoxy. While that type of fiberglass cost a little bit more, we save on resin and weight.
All planking panels have been precisely calculated: you cut them flat on the floor, no need for templates, no need to take measurements from the hull framing as in the plywood on frame method.
The internal framing is characteristic of a fiberglass or composite boat: a monocoque structure made of interlocking bulkheads and stringers, tabbed to the hull and fiberglass chines and keel.

The hull can be built without any jig, the sharpie way but we recommend to build her upside down on a simple jig. The plans give all the dimensions for each method including specifications for the jig.

(Excerpt from the plans)

Our jig system is very uncomplicated, self-aligning and economical since we use the internal framing of the hull as molds. Our jig does not require all the precautions, alignments or even a perfectly flat floor that are a must for traditional boat building.

Required Skills:
As all our stitch and glue boats, the GV13 is easier to build than other plywood or fiberglass boats. No woodworking skills or special tools are required. The plans include all dimensions to cut all the hull parts flat on the shop floor. No scarfing required.

The plans show all the plywood parts, even the smallest ones, with dimensions, including the assembly notches, the outboard clamp etc.
The small side console is also shown on the plans.

Options:
There are many options to consider but the first one should be positive and upright buoyancy (unsinkable boat).
This can easily be easily achieved with our marine flotation foam. For production boats in that size, the USCG requires upright floatation.

Bill Of Materials:
(Excerpts from our BOM)
The BOM list materials based on our standard layout and includes a 15% waste factor for resin and fiberglass. For plywood, we use standard sheets 4' x 8' (122 x 244 cm). Please read the building notes and see the plans for detailed specifications. Marine Tech or XL boat building plywood is an inexpensive type of marine ply ideal for stitch and glue construction. It cost, on the average, less than $ 20.00 a sheet in 1/4" (6mm). Okume or Meranti marine can also be used and cost starts at less than $ 40.00 a sheet (1/4"). Good quality exterior is acceptable if it has no voids.

The scantlings are very generous: this boat is overbuilt but despite that, thanks to the material, she is still much lighter than most boats in her size.

Cost:
See our kits and add the cost of plywood.

Labor:
The hull can be build in 50 hours but a finished boat will require 100 hours or more depending on the level of detail and the skills of the builder.

More:
Visit our message board, help pages, tutorial pages and read our FAQ: most questions are answered there.

Plans Packing List: