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To Build or Not to Build According to Howard I. Chapelle

It should be mentioned that the NAVIGA rules also provide the option to contest organizers to award cash prizes. From what I've heard, these can be substantial in the international championships. Apparently, none of the Western Hemisphere nations support national ship modeling organizations affiliated with NAVIGA, so North American ship modelers are unable to participate in what is a very active international "sport" (as they consider it) in the rest of the world. The NAVIGA rules are somewhat like the Olympics. Competitors must be citizens and residents of the nation they represent in the international competitions and members of their national ship modeling association.

We don't have a national NAVIGA-qualifying ship modeling association here in the U.S. Looking at just the static models online, perhaps it's because we've got a lot of catching up to do before the average modeler here could be at all competitive.

NAVIGA does not only hold competitions for "static" or "display" models. It has other competitive classes for self-propelled and sail-propelled ship models, radio controlled and otherwise, and racing classes for various sailboat and hydroplane models, too!
 
we do not have a national organization other than the NRG. There are regional rules for contests. Here are some definitions for scratch building


Pacific Coast Region
MODEL CONTEST
JUDGING GUIDELINES

SCRATCH BUILDING
“This deals with all parts of the model which have been FABRICATED BY THE BUILDER.” (PCR
Contest Directory)
How much did the modeler build from scratch, and how difficult was the scratch building?
This category deals with all parts of the model which have been fabricated by the modeler
from basic wood, metal, plastic, or other shapes and materials. Are major portions of the model built
from scratch, or just some parts and details? Consider the amount of effort required to convert basic
materials into finished parts. Bending grabirons from wire, for example, is less difficult than
soldering together piping or railings. Consider any planning or design work that was necessary.
Drawing your own plans is considered part of scratch building, if the plans are submitted with the
model. Scratch building from prototype plans, photos, or measurements is usually more difficult than
scratch building from kit plans or a magazine article.
Casting or photo-etching is considered scratch building, although less difficult than making
several identical parts from scratch. Did the modeler carry out all the steps from a scratch-built
master to finished duplicates, or were either the masters or the duplicates created by others?


National Contest Class Specific Rules
IPMS/USA National Convention
Conversions and Scratch-Built:
A scratch-built entry is one for which there is no commercially available kit. The modeler develops the entry using scratch-building materials and methods to create the parts and model in accordance with plans.

A totally, or primarily, 3D printed model is not considered scratch built.
Commercially available detail parts (i.e., photoetch, resin, 3D print, metal) may be used in the completion of the model, but will not comprise the major portion of the scratch- built entry.
A conversion entry is a commercially available kit which has its class, configuration, or silhouette SUBSTANTIVELY CHANGED by the modeler, using either a commercially available conversion set, scratch-building materials or parts from another model. The effectiveness or complexity of the conversion or scratch-built entry may be considered.
 
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