AQUATIC TRASH HUNTER/FLOATING WEED SKIMMER BOAT
TANDEM HYDRAULIC & STERN DRIVE PROPULSION
TECHNICAL SPECIFICATIONS FOR TENDERING PURPOSES
GENERAL DESCRIPTION:
The Skimmer Boat shall be a self-contained system, based on a catamaran type barge,
designed for retrieving floating debris and weeds and suitable for operation by one operator. The
Skimmer Boat shall be capable of collecting, storing and unloading floating debris using onboard
mechanical conveying system. The Skimmer Boat shall be capable of utilizing the specialized
equipment, i.e.: Shore Conveyor or Trailer.
FLOTATION:
The hull shall be made of catamaran design consisting of two closed deck
Pontoons. Each pontoon shall be comprised of (minimum) three water-tight compartments and
shall be equipped with one bottom protective skid.
Barge design and material:
The pontoon skin shall be fabricated from a combination of 14 to 11 GA./1.9 to 3.00 mm carbon
steel sheet supported by an internal frame made of 1-1/2” x 1-1/2” / 38.1 x 38.1 mm HSS tubing
and/or fabricated profiles made of 12 ga/2.66 mm carbon steel sheets. The barge stern shall be
provided with two horizontal ribs formed into the side walls for additional strength and to be
positioned to provide an indication of the barge’s maximum draft and vessel’s level.
The hull bottom protective skid shall be made of 3” x 3” / 76.2 x
76.2 mm HSS tubing.
All pontoon attachments i.e. clevises, bridge and conveyor mounting pads shall be supported by
reinforcing channels.
The hull shall be supplied with four lifting lugs/tie down brackets (two on each side) and also with
four (4) tie down brackets (two at the bow and two at the stern).
The access areas on both sides of the hull deck shall be provided with anti-skid strips.
POWER SYSTEMS & CONTROL BRIDGE:
The power system is a 4 cylinder, liquid-cooled Kubota turbo diesel, with an output of 60 HP/44.5
kW @ 2600 rpm at sea level or approved equal.
The hydraulic system shall consist of a variable volume pump system providing independent
power for two hydraulic outdrives and trash hunter operational functions. The system shall be
equipped with hydraulic oil cooler.
The hydraulic tank capacity shall be at least 50 US gal/186 liters and shall be provided with a
combination of oil level and temperature gauge, drain plug, hydraulic oil filter of 50 US gal/190
liters per minute capacity, magnetic dipstick and lockable cap.
The fuel tank capacity shall be at least 18 US gal/66 liters and shall be supplied with an electric
fuel gauge, drain plug, lockable cap and water separator. The fuel lines and tank shall comply
with SAE/ISO marine standards.
The Skimmer Boat superstructure shall be located symmetrically above the storage conveying
system and its length shall be at least 6’-0”/1830 mm.
The power train shall be located behind the operator platform and supplied with an engine
cover and lockable battery box.
Hydraulic functions control system shall be mechanically and/or electrically operated.
The hydraulic control panel shall be supplied with full instrumentation and shall be located in an
unobstructed place at comfortable distance for the operator. The operator seat shall be of
ergonomic design, adjustable and vinyl-covered.
The control panel shall be supplied with full instrumentation with the gauges located
the right side of the operator’s seat.
on
COLLECTING HEAD:
The collecting head shall consist of a debris pick-up conveyor with side walls. The front end of
each side wall shall be equipped with movable vertical conveyor/head wings. The rear end of the
head shall be supported by stationary post bearings and also by the head lifting cylinders, which
enable adjustment of the debris skimming depth of the head.
The collecting head side walls shall be made of formed 12 ga/2,6 mm steel sheets. The
submerged portion of the side walls shall have openings covered with expanded sheet metal
providing minimum restriction to the water flow during the skimming operation.
The collecting head shall be capable of being raised above the barge deck level and of being
lowered to a desirable skimming depth by hydraulically actuated lifting cylinders.
The collecting head conveyor support structure shall be made of a combination of carbon
steel fabricated profiles, HSS tubing and fabricated channels.
The head conveyor drive shafts shall be driven by one or two hydraulic motors through a #40
chain coupling. The drive shaft shall be made of 3”/76.2 mm diameter x 3/16”/4.76 mm wall
D.O.M. tubing supplied with weldable cast iron flanged sprockets to prevent damage to the shaft
tubing, and with a 4”/101.6 mm pitch diameter.
The conveyor idler shaft shall be made of the same material as the drive shaft and may be either
smooth roller or supplied with sprockets.
The conveyor shafts shall be supported by 4 bolt flange bearings bolted to take-up plates. The
adjustable take-ups shall be supplied with 3/4”/19.05 mm diameter stainless steel threaded rods.
The head conveyor shall be supplied with two widths of 24”/610 mm wide heavy duty belting (flat
wire steel mesh).
The conveyor belting top and return runners shall be supplied with 1.375” x .25”/35 mm x 6.35mm
UHMW plastic strips.
The collecting head operational dimensions shall be:
- hydraulically adjustable collecting swath
From fully closed to 10’-0”/3050 mm wide
- skimming depth
18”/457 mm min.
- conveyor width
4’-2”/1270 mm min.
- conveyor belting
Heavy duty stainless steel
- head side conveyor/wings
Hydraulically adjustable
* Alternate belt material & attachment option shall be offered to suit particular needs.
STORAGE CONVEYOR & UNLOADING SYSTEM:
The front storage and rear storage (unloading) conveyors shall be driven by one or two hydraulic
motors coupled to the drive shaft by a #40 chain coupling.
The storage conveyors shall be supplied with two widths of 24”/610 mm wide heavy duty belting
(flat wire steel mesh).
The storage conveyor side wall shall be made of 14 ga/1.9 mm carbon steel sheet metal.
The rear storage conveyor shall be supplied with welded tubular cross conveyor frame required
for side wall reinforcement and for equalizing the lifting motion of the two lifting cylinders.
The rear storage conveyor shall be supplied with gravity couplings to enable the Skimmer Boat to
couple with other matching supporting and auxiliary equipment.
The rear storage conveyor shall extend to a minimum of 6’-0” /1830 mm beyond the stern of the
barge.
The rear conveyor lift (unloading height) shall be hydraulically height adjustable above the barge
deck level or as required for proper coupling alignment with other auxiliary equipment.
The vessel carrying capacity shall be a minimum of 200 cu. ft./5.7 m³, load weight the equivalent
of 3500 lbs./1590 kg minimum.
The belt tracks of the storage conveyor shall be lined with 1.375” x .25”/35 x 6.35 mm UHMW
plastic strips.
PROPULSION:
The Skimmer Boat shall be provided with tandem hydraulically powered, independently driven
and reversible outboard propulsion units, one of each located on the left and right pontoon stern.
The propulsion units shall have lift capability to provide access for maintenance.
Each of the propulsion units shall be supplied with marine propeller or Archimedes screw/auger.
The tandem propulsion system shall provide adequate thrust force to achieve maximum vessel
speed of 6 knots/11 km per hour.
ANTI-CORROSION SYSTEM:
All weldments and fabricated steel parts, except the stub ends, galvanized and stainless steel
components, shall be grit blasted, primed and painted with two coats of high impact, high
visibility, safety orange, thermally cured epoxy. The total thickness of coating shall be 8 to 10
mils. / 0.20 to 0.25 mm.
STANDARD SAFETY EQUIPMENT:
Fire extinguisher, life jacket, 50’/15 m of ½”/12.7 mm rope and anchor.
ADDITIONAL INFORMATION:
All fasteners shall be made of 304/316 stainless steel.
The speed of operation of all hydraulically driven components shall be adjustable manually
through lockable flow control valves.
The main hydraulic system shall be protected by a relief valve.
All hydraulic hard lines shall be made of stainless steel tubing, where technically justified.
hydraulic hoses, fittings, adaptors and couplings shall be industrial quality, Aeroquip or
equivalent.
All
SPARE PARTS & TOOLS:
A recommended spare parts package and tool kit shall be offered by the manufacturer. Original
replacement / spare parts availability shall be guaranteed by the manufacturer for a minimum
period of 5 years.
OPTIONAL EQUIPMENT:
Recommended optional equipment shall be offered by the manufacturer.
The optional stainless steel hull shall be of the same design as the carbon steel hull. The hull skin
shall be made of grade 304 stainless steel sheet and also internal structure and external
attachments of stainless steel.
WARRANTY:
One (1) year or 1000 hours warranty, whichever expires first, for fabricated parts and the
structure. The standard manufacturer’s warranty applies to all purchased parts.
MANUALS:
The equipment shall be provided with one (1) complete set of manuals consisting of at least one
(1) Operation and one (1) Maintenance Manual, Parts Book and Engine Manual, with the delivery
of the equipment.
OPERATOR & SERVICE TRAINING:
Up to two (2) days of operator and service training shall be provided at the customer’s site as
required.