DCD Dynamic ChangePoint Detection

1

• In-Water Hull Cleaning Sampling Device
• Device measures potential contamination prior to
  in-water cleanings
• The U.S. Navy seeks to commercialize a device and
  method for measuring contaminants likely to be
  released during in-water hull cleanings. This
  technology is covered by U.S. Patents 7,437,959
  In-Water Hull Cleaning Sampling Device and
  7,444,891 In-Water Hull Cleaning Sampling
  Method.
• Background
• Watercraft hulls are covered with chemical
  anti-fouling coatings to reduce biological growth
  on their surfaces, which increase drag and raise
  fuel consumption. Typical cleaning methods use
  abrasive materials to rub against toxic hull
  coatings, releasing copper, zinc, and other
  toxins into coastal waterways. Some environmental
  regulations do not allow in-water cleanings and
  others restrict cleanings based on types and
  levels of materials released during the cleaning
  operation. If in-water cleanings are prohibited,
  cleanings must be conducted in dry docks, which
  are expensive and not widely available. Measuring
  potential contamination prior to conducting
  in-water cleanings is necessary to determine
  whether the procedure meets environmental
  guidelines. Sampling the types and levels of
  contaminants prior to cleaning can reduce costs
  by determining if the use of expensive dry dock
  cleaning procedures are unnecessary.
• The Technology
• SSC Pacific has developed a sampling method and
  device that attaches to a watercrafts hull and
  creates a watertight seal. It then simulates
  in-water hull cleaning with variable pressure,
  rotation, and cleaning pad material to accurately
  simulate different cleaning procedures.
  Contaminants that are removed from the hull
  during simulated cleaning are contained in the
  devices sample chamber for measurement and
  testing. This provides valuable information about
  amount and types of materials that would be
  released into waterways to determine whether the
  procedure meets environmental regulations.
• Key Benefits
• Ability to seal chamber and remove contaminated
  water sample after use to avoid releasing
  contaminants into water
• Variable test pressure and cleaning pad material
  to accurately simulate different cleaning
  procedures
• Ability to test water inside chamber and display
  results on external LCD or LED display or store
  data on a hard drive
• Many power options including electric, gas,
  battery, and hand or foot crank
• Development Status
• Two U.S. patents issued
• 1. 21 Oct 2008 U.S. Patent 7,437,959

Device measures contaminants prior to cleaning to
determine if levels meet environmental regulations
Reduces risk of using expensive dry dock
procedures when unnecessary
Mechanical drive
Watertight material
Sampling chamber
Pressure spring
Cleaning pad
Boat Hull