ISO Standard, CE Mark of Certification
The ISO (International Organization for Standardization) small craft
standards are the emerging worldwide regulations governing the design
and construction of vessels both power and sail, of up to 24 meters
(79 feet) in length. In order for boats to be sold or imported into
Europe, it is currently mandatory that each model obtain CE mark certification.
This certification is based on the ISO standards, which cover the
entire vessel and its systems. They include the boat's designated
type of use, stability and buoyancy, structures, cockpit drainage,
visibility from the helm, and the fuel, electrical, steering, and
fire protection systems. Onboard equipment, including engines, electrical
equipment, pumps, tanks, hoses, hatches, port lights, navigation lights,
etc., must also be CE mark certified.
New structural requirements are now in the process of being incorporated,
into the ISO standards. These are based on the vessel dimensions;
type of use, speed, and structural arrangement, the new standards
will require that calculations be performed in order to determine
the required scantlings and laminates for the various parts of the
boat. All our boats have passed these requirements.
The structure design of most of our powerboats have been designed
to exceed the 2003 draft ISO small craft structural requirements
for design category A, "ocean". This is the international
standard's toughest design category, and is defined as the "category
of boats considered suitable for seas of up to 7 meters (23 feet)
significant wave height and winds of Beaufort Force 9 (41-47 knots)
The ISO calculations, category "A" were used at the top
design speed of 50 knots on most of our powerboats. Design pressures
have been calculated for the hull bottom, hull sides, decks, bulkheads,
grid, and superstructure.
ISO has specified material standards of the required laminates.
These material standards are based on E-glass fabric with polyester
resin, which are by far the most common materials used in the boatbuilding
industry today. The standards specify, for the type of glass fabrics
used in construction and a glass/resin ratio of 50%.
The laminates we use in our construction exceed the ISO material
standards, by a considerable margin:
1. All of our boats are entirely built with epoxy resin, NOT the
less expensive, polyester resin. Epoxy resin is a superior laminate
to polyester for a number of reasons:
• Higher mechanical properties- Epoxy resin is stronger than polyester
• Improved fatigue characteristics- Epoxy resin is more durable
than polyester resin.
• Superior resistance to water degradation.
• Superior adhesion properties- Epoxy resin is much better at "binding"
than polyester resin. This "binding" of the resin to the
E-Glass fabric will hold the entire boat together much better!
• All Craig Marines boats use E-Glass and Epoxy resin , some may
have Carbon fiber and Kevlar incorporated into the materials used
2. Our boats have a higher glass/resin ratio than that specified
by the ISO standard. The high-tech construction methods and process
controls employed by Craig Marine result in a higher glass/resin
ratio. That will significantly exceed the ISO standard of 50%. Our
higher the glass/resin ratio will make you stronger the boat.
3. Craig Marine boats are Vacuumed bagged resin infused and oven
controlled cured at 120 degrees
The Highest Strength and Lightest
Our laminates and build process exceed ISO standards' toughest requirements.
However, aren't there Builders saying the more weight, the better?
Yes, but that claim does not make much sense. The problem with weight,
demands for larger engines to get the boat up on a plane, which
demand more fuel.
A stronger, high-tech lighter boat provides its owner with significant
• It is more fun to drive, offering higher speed and increased maneuverability
with the same horsepower. A smaller engine with less horsepower
is required for equal speed, reducing fuel consumption and operating
• Lighter weight makes a narrow beam possible (if needed), which
in turn makes trailering possible.
• Cored construction with high strength skins enables the boat to
be dramatically stiffer.
• The principal core material employed in the construction of our
boats comes from DOW Chemical. We use the highest density of DOW
Core in the hull, topsides and bulkheads.
While most other builders use a lower density foam in the topsides
Rugged where it Needs to
be........... and more
Our boats are just overbuilt where it really matters. The hull bottom
includes a reinforced cored grid, which incorporates
the engine foundations and the hull stiffeners into one single very
strong unit. The grid exceeds the ISO structural requirements for
this part of the boat; think about that when driving into a seaway
at high speed.
For extra protection against possible grounding or impact, we have
solid fiberglass keel and chines running from bow to stern.
The structure and laminates of Craig Marine are significantly stronger
and more durable than the new ISO structural requirements because
• Epoxy instead of polyester resin laminates
• Over the 50% glass/resin ratio of the minimum ISO Standard
• Thicker, structurally stiffer, cored composite hull, deck, and
• Overbuilt grid in hull bottom
• Solid epoxy glass on bottom centerline and chines for protection
• Vacuumed bagged resin infused and oven cured
Exceptionally strong, light, High-Tech Composite
Cored Construction utilizing only the highest grade of Epoxy resins
along with knitted Bi-axial / Tri-axial E-glass, Kevlar, Carbon
Fabrics and DOW Core, then the materials are precisely cut, fitted
laid by hand into the mold. The components are then Vacuum Bagged,
Resin Infused, and Oven Controlled Cured, this greatly improves
the Fiber-to-Resin ratio, ensuring maximum laminate adhesion, and
even penetration of the resin.
Vacuum bagging makes possible a lightweight construction
without compromising strength and durability.
Our boats are just overbuilt where it really matters.
The hull bottom includes a matrix of longitudinal and transverse
composite cored stringers to provide maximum stiffness this reinforced
grid incorporates the engine foundations and the hull
stiffeners into one single very strong unit. For extra protection
against possible grounding or impact, we have solid fiberglass keel
and chines running from bow to stern. We glass in the stringers,
bulkheads, inner liners, all other structural components, and the
fuel tanks while the hull is in the mold. This insures that there
is no hull distortion.
The Hull and Deck are assembled using Plexus "Fiberglass
Fusion" adhesives, which chemically fuses the deck and hull
together at a molecular level. This actually creates a bond that
is stronger than the fiberglass/resin itself.
The result is a stronger, lighter, faster boat.